Fusion Drive empty space lost
Hi to everyone!
I use Fusion Drive 1 TB on a iMac 21'. I've tryed to create a new partition with Bootcamp in order to install W7, but it was lasting too much (it seemed stopped), so I've decided to cancel Bootcamp (Command-Q) and to start again. What my surprise was that using Disk Utility, the space I've assigned to install W7 was created, however I couldn't install W7. Then I've decided to erase that partition in order to recovering the free space, but however I couldn't re-size the main partition Macintosh HD. Now I have 740,97 Gb with free space, but I can't re-size Macintosh HD. Neither I can create a new partition, Disk Utility doesn't work. I don't know what else to do. I've reinstalled everything with Time Machine and I've reiniciate the computer using Command+R, in order to use Disk Utility out of the operating system, but the result is the same. I feel distressed. Can anyone help me? I show you a pic of my Disk Utility with the problem.
Thank you very much to everybody. Greetings.
I'VE GOOOOT IIIITT!!!!!!!!
LowLuster, yesterday I've been thinking about your suggestion before you've told me it, but finally I've recovered all the lost space in my Fusion Drive unit. How have I done it? I tell all of you briefly:
While MacOS running, I used again Bootcamp Assistant to create a little 20 Gb partition. The computer restarts but I using Option button, I chose again MacOS. Once more I run Bootcamp Assistant to recover "the lost space", or at least the space that I've quit to Macintosh HD partition to creat Bootcamp partition (those 20 Gb). When it finished, what was my surprise using Disk Utility observing that Bootcamp Assistant recovered all the space on my Fusion Drive! Oh yeah! I couldn't believe it!
I caused the problem of lost space canceling the process when Bootcamp was creating the partition. That was my mistake. So I've learned the lesson
Here is the sample of it:
Thank you very much all of you and Greetings from Spain.
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Free Space Partition on Mac HD - 3TB Fusion Drive Late 2013 iMac
I have managed to create a free space partition on my Mac HD that I now cant get rid of. This happened when I was trying to run bootcamp and during the Windows install I created a new partition that wiped the bootcamp partition and turned it into free space. Have attached a screen shot of my HD. I have already tried re-formatting the free space partition but nothing happens, just goes back to free space. Any help/ideas would be appreciated. Thanks!
Late 2013 iMac-3TB Fusion driveTry highlighting the top space and there should be a arrow of sorts in the bottom right hand corner, like this.
Click and hold on it and drag it down to take up the free space.
If there is no 45º lines then you have separated that space from the Logical Storage Volume that makes up the Fusion drive and it can't be put back in without wiping out the Fusion drive and recreating it. At least no way that I know of. -
Recovery of Win 8.1in 32-GB Flash Drive without losing empty space.
Hi i have a new Hp p001tx Windows 8.1 NB.
I choose a new USB flah drive 32gb for taking a recovery backup in HP recovery Manger Tool.
It prompted only 20 GB of empty space is needed.
But it also said that the remaing 12GB (ie 32gb-20gb =12gb) storage in the new flash dirve will become unsable. Why?
Question:
1. Can i do two partition in the same flash drive as 21gb +11gb =32gb and then take backup in the 21gb partion and use the other 11gb for storing personal data using recovery manager tool.
2. Will this idea work to use the same flash drive for booting from the backup and use the remaing 11GB for storing data.
3. Tell a way to make two partitions (21gb +11gb) respectively and use it for both purpose.
Kindly sugest a method to utilize the full allowance.None of your requests are advisable or if done manually will corrupt the Recovery media. The whole 32gb flash drive has to be solely utilised for recovery media alone.
If you're not okay with that, you can make Recovery DVD.
Regards
Visruth
++Please click KUDOS / White thumb to say thanks
++Please click ACCEPT AS SOLUTION to help others, find this solution faster
**I'm a Volunteer, I do not work for HP** -
First off I have a 3tb fusion drive.
I created a 200gb bootcamp, I tried deleting the bootcamp because I thought I messed it up and googled how to delete a mac partition which told me to use Disk Utility, did that and then erased it and somehow it got locked and wouldn't let me do anything to any partition on my hard drive (everything was greyed out)
After looking up and googling for hours I found a post saying the only way to fix it would be to go into CMD+R and go into the terminal window and type out disklist and then find the first UUID number and do something along the lines of disklist delete (UUID) i forget the exact formula. I did this, and then I had 3 separate untitled hard drives.
One in the size of 1.9gb on in 800gb and one in 121.3gb (which is the SSD), I put my time machine backup onto the 1.9gb untitled and now my computer is booting slowly (because it's no longer running off of the SSD and the original bootcamp is still there.
To be honest I am absolutely confused on what else to do!
Is there anyway I can fix this?How do I go about deleting and then re-adding the hard drives? Completely lost on how to make it back to being a 3gb fusion drive.
Thank you for all your help, I honestly really appreciate it.
I followed your instructions and got the following
diskutil list:
-bash-3.2# diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *121.3 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 120.5 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *3.0 TB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_CoreStorage 1.9 TB disk1s2
3: Apple_Boot Recovery HD 650.0 MB disk1s3
4: Apple_CoreStorage 251.9 GB disk1s4
5: Apple_Boot Boot OS X 134.2 MB disk1s5
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: Apple_partition_scheme *1.3 GB disk2
1: Apple_partition_map 30.7 KB disk2s1
2: Apple_HFS OS X Base System 1.3 GB disk2s2
/dev/disk3
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Untitled *1.9 TB disk3
Logical Volume on disk1s2
FD9357F1-1A71-44A0-A01E-41C84F1C8047
Unencrypted
/dev/disk4
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Untitled *251.5 GB disk4
Logical Volume on disk1s4
31B60F49-6981-47A3-9815-6396AD3A9BD6
Unencrypted
/dev/disk5
#: TYPE NAME SIZE IDENTIFIER
0: untitled *5.2 MB disk5
/dev/disk6
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk6
/dev/disk7
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk7
/dev/disk8
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk8
/dev/disk9
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk9
/dev/disk10
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk10
/dev/disk11
#: TYPE NAME SIZE IDENTIFIER
0: untitled *6.3 MB disk11
/dev/disk12
#: TYPE NAME SIZE IDENTIFIER
0: untitled *2.1 MB disk12
/dev/disk13
#: TYPE NAME SIZE IDENTIFIER
0: untitled *1.0 MB disk13
/dev/disk14
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk14
/dev/disk15
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk15
/dev/disk16
#: TYPE NAME SIZE IDENTIFIER
0: untitled *1.0 MB disk16
/dev/disk17
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *319.4 GB disk17
1: EFI EFI 209.7 MB disk17s1
2: Apple_HFS IMAC TMB 319.0 GB disk17s2
/dev/disk18
#: TYPE NAME SIZE IDENTIFIER
0: untitled *6.3 MB disk18
/dev/disk19
#: TYPE NAME SIZE IDENTIFIER
0: CD_partition_scheme *804.4 MB disk19
1: Apple_partition_scheme 700.4 MB disk19s0
2: Apple_partition_map 32.3 KB disk19s0s1
3: Apple_HFS WD SmartWare 237.5 MB disk19s0s2
-bash-3.2#
diskutil cs list
-bash-3.2# diskutil cs list
CoreStorage logical volume groups (2 found)
|
+-- Logical Volume Group 687E889E-B4A1-4F20-8B36-43D7A3701076
| =========================================================
| Name: Untitled
| Status: Online
| Size: 1946162462720 B (1.9 TB)
| Free Space: 5402624 B (5.4 MB)
| |
| +-< Physical Volume 7BCD8D9C-AEB2-4D48-B248-257EFC7EA922
| | ----------------------------------------------------
| | Index: 0
| | Disk: disk1s2
| | Status: Online
| | Size: 1946162462720 B (1.9 TB)
| |
| +-> Logical Volume Family 3A8A9627-5963-49BA-8E2F-96DC7A1B033D
| ----------------------------------------------------------
| Encryption Status: Unlocked
| Encryption Type: None
| Conversion Status: NoConversion
| Conversion Direction: -none-
| Has Encrypted Extents: No
| Fully Secure: No
| Passphrase Required: No
| |
| +-> Logical Volume FD9357F1-1A71-44A0-A01E-41C84F1C8047
| ---------------------------------------------------
| Disk: disk3
| Status: Online
| Size (Total): 1945804734464 B (1.9 TB)
| Conversion Progress: -none-
| Revertible: No
| LV Name: Untitled
| Volume Name: Untitled
| Content Hint: Apple_HFS
|
+-- Logical Volume Group 98213AE6-9EA8-4FB7-8B72-8E08BFBFD82C
=========================================================
Name: Untitled
Status: Online
Size: 251864797184 B (251.9 GB)
Free Space: 5226496 B (5.2 MB)
|
+-< Physical Volume 20CEF763-635D-4A0D-A107-40E8FB161D06
| ----------------------------------------------------
| Index: 0
| Disk: disk1s4
| Status: Online
| Size: 251864797184 B (251.9 GB)
|
+-> Logical Volume Family 2D3173B3-5B04-47E6-B331-49D1BA58E9F2
Encryption Status: Unlocked
Encryption Type: None
Conversion Status: NoConversion
Conversion Direction: -none-
Has Encrypted Extents: No
Fully Secure: No
Passphrase Required: No
|
+-> Logical Volume 31B60F49-6981-47A3-9815-6396AD3A9BD6
Disk: disk4
Status: Online
Size (Total): 251507245056 B (251.5 GB)
Conversion Progress: -none-
Revertible: No
LV Name: Untitled
Volume Name: Untitled
Content Hint: Apple_HFS
-bash-3.2#
Disk0
-bash-3.2# gpt -vv -r show /dev/disk0
gpt show: /dev/disk0: mediasize=121332826112; sectorsize=512; blocks=236978176
gpt show: /dev/disk0: PMBR at sector 0
gpt show: /dev/disk0: Pri GPT at sector 1
gpt show: /dev/disk0: Sec GPT at sector 236978175
start size index contents
0 1 PMBR
1 1 Pri GPT header
2 32 Pri GPT table
34 6
40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
409640 235298960 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC
235708600 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
236978136 7
236978143 32 Sec GPT table
236978175 1 Sec GPT header
-bash-3.2#
Disk1
-bash-3.2# gpt -vv -r show /dev/disk1
gpt show: /dev/disk1: mediasize=3000592982016; sectorsize=512; blocks=5860533168
gpt show: /dev/disk1: PMBR at sector 0
gpt show: /dev/disk1: Pri GPT at sector 1
gpt show: /dev/disk1: Sec GPT at sector 5860533167
start size index contents
0 1 PMBR
1 1 Pri GPT header
2 32 Pri GPT table
34 6
40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
409640 3801098560 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC
3801508200 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
3802777736 1912
3802779648 491923432 4 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC
4294703080 262144 5 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
4294965224 1565567911
5860533135 32 Sec GPT table
5860533167 1 Sec GPT header
-bash-3.2# -
I'd like to create my own MAC Fusion Drive, but I'm not a dev so I need a little bit of guidance, which would also help a lot of people I'm guessing.
I am trying to follow jollyjinx's instructions, which are not that detailed. Specifically, I am trying to find the names of my two drives and I can only find one. Maybe the drives are not connected in a way to do this I'm not sure. I have a 750GB HDD and an 80GB SSD installed internally in my 2011 Mac Mini. I have been using both drives, SSD for the OS and a handful of common files and the HDD for iPhoto and iTunes libraries. A Fusion drive would be perfect!
When I run dmesg in Terminal, here is what I get:
-bash-3.2# dmesg
PMAP: PCID enabled
Darwin Kernel Version 12.1.0: Tue Aug 14 13:29:55 PDT 2012; root:xnu-2050.9.2~1/RELEASE_X86_64
vm_page_bootstrap: 2003271 free pages and 77497 wired pages
kext submap [0xffffff7f8073e000 - 0xffffff8000000000], kernel text [0xffffff8000200000 - 0xffffff800073e000]
zone leak detection enabled
standard timeslicing quantum is 10000 us
standard background quantum is 2500 us
mig_table_max_displ = 74
TSC Deadline Timer supported and enabled
corecrypto kext started!
Running kernel space in FIPS MODE
Plist hmac value is 735d392b68241ef173d81097b1c8ce9ba283521626d1c973ac376838c466757d
Computed hmac value is 735d392b68241ef173d81097b1c8ce9ba283521626d1c973ac376838c466757d
corecrypto.kext FIPS integrity POST test passed!
corecrypto.kext FIPS AES CBC POST test passed!
corecrypto.kext FIPS TDES CBC POST test passed!
corecrypto.kext FIPS AES ECB AESNI POST test passed!
corecrypto.kext FIPS AES XTS AESNI POST test passed!
corecrypto.kext FIPS SHA POST test passed!
corecrypto.kext FIPS HMAC POST test passed!
corecrypto.kext FIPS ECDSA POST test passed!
corecrypto.kext FIPS DRBG POST test passed!
corecrypto.kext FIPS POST passed!
AppleACPICPU: ProcessorId=1 LocalApicId=0 Enabled
AppleACPICPU: ProcessorId=2 LocalApicId=2 Enabled
AppleACPICPU: ProcessorId=3 LocalApicId=1 Enabled
AppleACPICPU: ProcessorId=4 LocalApicId=3 Enabled
AppleACPICPU: ProcessorId=5 LocalApicId=255 Disabled
AppleACPICPU: ProcessorId=6 LocalApicId=255 Disabled
AppleACPICPU: ProcessorId=7 LocalApicId=255 Disabled
AppleACPICPU: ProcessorId=8 LocalApicId=255 Disabled
calling mpo_policy_init for TMSafetyNet
Security policy loaded: Safety net for Time Machine (TMSafetyNet)
calling mpo_policy_init for Sandbox
Security policy loaded: Seatbelt sandbox policy (Sandbox)
calling mpo_policy_init for Quarantine
Security policy loaded: Quarantine policy (Quarantine)
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
MAC Framework successfully initialized
using 16384 buffer headers and 10240 cluster IO buffer headers
IOAPIC: Version 0x20 Vectors 64:87
ACPI: System State [S0 S3 S4 S5] (S3)
PFM64 (36 cpu) 0xf10000000, 0xf0000000
[ PCI configuration begin ]
AppleIntelCPUPowerManagement: Turbo Ratios 0057
AppleIntelCPUPowerManagement: (built 13:47:00 Aug 14 2012) initialization complete
console relocated to 0xf60010000
PCI configuration changed (bridge=16 device=5 cardbus=0)
[ PCI configuration end, bridges 13 devices 18 ]
mbinit: done [96 MB total pool size, (64/32) split]
Pthread support ABORTS when sync kernel primitives misused
rooting via boot-uuid from /chosen: 7B269773-B97B-335A-A4EF-A3D6956395BA
Waiting on <dict ID="0"><key>IOProviderClass</key><string ID="1">IOResources</string><key>IOResourceMatch</key><string ID="2">boot-uuid-media</string></dict>
com.apple.AppleFSCompressionTypeZlib kmod start
com.apple.AppleFSCompressionTypeDataless kmod start
com.apple.AppleFSCompressionTypeZlib load succeeded
com.apple.AppleFSCompressionTypeDataless load succeeded
AppleIntelCPUPowerManagementClient: ready
BTCOEXIST off
BRCM tunables:
pullmode[1] txringsize[ 256] reapmin[ 32] reapcount[ 128]
highWaterMark: VO[ 192] VI[ 192] BE[ 192] BK[ 192]
FireWire (OHCI) TI ID 823f built-in now active, GUID c82a14fffeeaff8c; max speed s800.
USBMSC Identifier (non-unique): 1690A44191FF 0x59b 0x370 0x0
USBMSC Identifier (non-unique): AA19164300000896 0x3f0 0xb107 0x8192
Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/EHC1@1D,7/AppleUSBEHCI/U SB FLASH DRIVE@fd133000/IOUSBInterface@0/IOUSBMassStorageClass/IOSCSIPeripheralDeviceNub /IOSCSIPeripheralDeviceType00/IOBlockStorageServices/IOBlockStorageDriver/hp USB Flash Drive Media/IOGUIDPartitionScheme/OS X MOUTNAIN LION INSTALL@2
BSD root: disk4s2, major 1, minor 15
imageboot_setup_new: root image url is file:///BaseSystem.dmg
IOHDIXController: NOTE: administrator is creating non-ejectable disk image
KDIFileBackingStore::_handleStart: initial R/W vn_open returned 30
imageboot_mount_image: root device 0x1000011
HFS: Low Disk: Vol: Mac OS X Base System freeblks: 30158, warninglimit: 30790
Kernel is LP64
ioqueue_depth = 64, ioscale = 2
Previous Shutdown Cause: 0
[BroadcomBluetoothHCIControllerUSBTransport][start] -- completed
DSMOS has arrived
[IOBluetoothHCIController][staticBluetoothHCIControllerTransportShowsUp] -- Received Bluetooth Controller register service notification
[IOBluetoothHCIController][start] -- completed
BCM5701Enet: Ethernet address c8:2a:14:59:28:c5
AirPort_Brcm4331: Ethernet address 28:cf:da:01:31:fd
IO80211Controller::dataLinkLayerAttachComplete(): adding AppleEFINVRAM notification
IO80211Interface::efiNVRAMPublished():
[IOBluetoothHCIController::setConfigState] calling registerService
AirPort: Link Down on en1. Reason 8 (Disassociated because station leaving).
en1::IO80211Interface::postMessage bssid changed
en1: 802.11d country code set to 'US'.
en1: Supported channels 1 2 3 4 5 6 7 8 9 10 11 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140 149 153 157 161 165
MacAuthEvent en1 Auth result for: 00:23:6c:bf:ae:20 MAC AUTH succeeded
wlEvent: en1 en1 Link UP virtIf = 0
AirPort: Link Up on en1
en1: BSSID changed to 00:23:6c:bf:ae:20
en1::IO80211Interface::postMessage bssid changed
AirPort: RSN handshake complete on en1
[ffffff8018e64c00][BNBTrackpadDevice::init][75.15] init is complete
[ffffff8018e64c00][BNBTrackpadDevice::handleStart][75.15] returning 1
[ffffff8019e85800][AppleMultitouchHIDEventDriver::start] entered
[ffffff8018da6c00][AppleMultitouchDevice::start] entered
MacAuthEvent en1 Auth result for: 00:23:6c:bf:ae:20 MAC AUTH succeeded
MacAuthEvent en1 Auth result for: 00:23:6c:bf:ae:20 Unsolicited Auth
wlEvent: en1 en1 Link UP virtIf = 0
AirPort: RSN handshake complete on en1
wl0: Roamed or switched channel, reason #4, bssid 00:23:6c:bf:ae:20
en1: BSSID changed to 00:23:6c:bf:ae:20
en1::IO80211Interface::postMessage bssid changed
-bash-3.2#
I can only find one reference to a drive in the data, but maybe I'm missing something. Any help would be greatly appreciated!So far, so good! The article steps worked perfectly. I setup the Fusion Drive and then restored from my Time Machine Backup (from the SSD). I then moved the files over that were on the HDD (which I also backed up on my external drive. Everything seems to be working great! The volume was previously named 80 SSD OS X (to differentiate from the HDD) and it is still named that, although, as you can see from the screenshot, it now has a 576GB capacity (not 750GB, which is what I thought I put in there--my memory is horrendous! lol) ....not a big deal. I consider this a huge success at this point. Thanks again for the article!
-
Fusion drive DIY not using SSD
Hello community,
Recently I have bought a SSD drive for my Mac Mini 2012, in order to make a dual hard drive installation ready to build a DIY Fusion Drive with Disk Utility. Apparently it works well, I have installed Yosemite without any problems and been using the Mac Mini normally. The problem is that it's very slow performance when it needs to read/write from disk, I've got around 40mb/s read and 35mb/s write speeds on BlackMagic disk speed tests.
In addition, checking the installation of the drives running "diskutil list" from command line (which tells me that disk0 is the SSD and disk1 is the HDD), and the disk usage with "iostat disk0 disk1 1" I can see that the OS is not really using disk0 but disk1 for all disk operations.
I noticed that eventually disk0 has movement but 99% activity is in disk1 (HDD). I believe that the normal behavior of a Fusion Drive is using SSD mainly and HDD in second instance for "not-cached" or less used files, but I am experiencing the opposite behavior.
The model of the SSD is Kingston HyperX 3K 240GB.
Please give me any advice about this issue.
Thanks for your help.
Best regards.Thanks for your replies.
Actually the SSD it's installed in the upper bay, because I've tried to install it at the bottom but Fusion Drive seems not to work, failing disk verification and prompting me to repair disk. In the upper bay seems to work fine, but I've this this issue.
This is my "diskutil cs list" output:
Mac-mini-de-Arturo:~ Bayo$ diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group FB3EEBCC-EBDA-4F7A-9256-0AE4A854C512
=========================================================
Name: Internal Drive
Status: Online
Size: 1239058448384 B (1.2 TB)
Free Space: 0 B (0 B)
|
+-< Physical Volume 3D0A6EE0-51FE-425C-B716-89215472D2D9
| ----------------------------------------------------
| Index: 0
| Disk: disk1s2
| Status: Online
| Size: 239713435648 B (239.7 GB)
|
+-< Physical Volume 397E16F1-877B-412B-8D7D-59A5BD47661A
| ----------------------------------------------------
| Index: 1
| Disk: disk0s2
| Status: Online
| Size: 999345012736 B (999.3 GB)
|
+-> Logical Volume Family 8FEAC5E2-11F2-4FE7-B980-945A0B81463C
Encryption Status: Unlocked
Encryption Type: None
Conversion Status: NoConversion
Conversion Direction: -none-
Has Encrypted Extents: No
Fully Secure: No
Passphrase Required: No
|
+-> Logical Volume 1621B9C3-17F9-4ABC-B8FF-767FEF074A94
Disk: disk2
Status: Online
Size (Total): 1230265384960 B (1.2 TB)
Conversion Progress: -none-
Revertible: No
LV Name: Macintosh HD
Volume Name: Macintosh HD
Content Hint: Apple_HFS
and, for more info, a screenshot of my current speed test with BlackMagic:
Many thanks! -
Best SSD to DIY a Fusion Drive.
Hi there, I'd like to know if any of you have personally a SSD brand you trust. I once purchased a SanDisk SSD for my work computer which failed before a year of usage. Later I purchased a Crucial/Micron SSD for my iMac which seems to be failing now, around only over 6 months of usage. I've replaced the SanDisk with a Kingston in my work computer but I'm not sure if it'll last at all.
For my iMac, though I've lost confidence in SSDs and I feel tempted to rely solely on the HDD, I'd like to know if you can advise other very reliable SSD options since the speed of a Fusion Drive is just spectacular.
Any recommendation? Thanks in advance.
Jorge...Do a Google search on the various brands and read the reviews about them. I haven't read of any that are outright unreliable. I haven't seen complaints about these drives failing in this forum or on PC forums. Like any piece of electromic equipment some will fail, that goes for SSD's as well as HDD's.
When you installed this SSD did you take precautions against static? Are you sure you followed all the steps in the installation process EXACTLY? Opening a newer iMac and installing a drive (SSD or HDD) is frought with pittfalls. One bad move and you can create big problems for yourself. With that said I've installed 3 HDD's and 2 SSD's in three different iMacs without problems. However I am very careful to work in a static free environment (wrist strap, static mat, etc.) I handle the components as little as possible, and take care that they are seated properly inside the iMac. It's very easy to pinch a cable or do something that will come back and bite you.
I mentioned MacSales because buying from a good vendor is just as important as buying a good component. I know MacSales stands behind what they sell, and that's important to me. (I am not connected in any way with MacSales, except being a satisfied customer) -
Is it possible on a fusion drive to have Maverick and Windows at the same time? Is it going to work the same way on windows ( I mean as fast as in osx)
Michael Conelly wrote:
After much gnashing of teeth, and a half dozen support calls, I'd all but given up. I finally seem to have solved this though - sort of - by installing windows 8.1 on boot camp on an older iMac, then cloning the bootcamp disk to an external thunderbolt drive via Winclone. That worked seamlessly, sticking to winclone's instructions, and I can boot via EFI to Windows 8.1 on the new iMac. So far so good.
I usually install W8.1 via EFI by using DU and a Free Space partition. The 3TB Fusion is first split into the underlying SSD/HDD physicals. OSX and Windows OSes are installed on SSD via EFI (no BCA). The OSX part and half the HDD are then used to create a new CS volume. The other HDD half becomes NTFS for non-Windows OS files. The Hybrid MBR method is completely unsatisfactory with the 3TB Fusion drive.
How is the TB/Winclone image for performance of the OS (since pagefile.sys is also on the TB)? -
From time to time on my new Mac Mini with 1 TB Fusion Drive, I am getting the following error: "Your Mac OS X startup disk has no more space available for application memory."
This would indicate an issue with being able to write swap files/virtual memory. If I understand how the Fusion Drive works, the virtual memory is stored on the 128 GB SSD portion. The SSD is full, considering I have 650 GB free on the 1.128 TB Fusion Drive.
Seems like a CoreStorage issue, as it's apparently not leaving enough space on the SSD for the swap files after the computer has been run for a while. I have 16 GB RAM in the Mini.
Restarting the computer solves the issue, although I often use the Mini in remote sessions and when this error comes up, performance on the Mini tends to be so sluggish that sometimes remote connections time out or drop, making it hard to even be able to restart the computer.Your problem is excessive swapping of data between physical memory and virtual memory.
That can happen for two reasons:
You have a long-running process with a memory leak (i.e., a bug), or
You don't have enough memory installed for your usage pattern.
Tracking down a memory leak can be difficult, and it may come down to a process of elimination. In Activity Monitor, select All Processes from the menu in the toolbar, if not already selected. Click the heading of the Real Mem column in the process table twice to sort the table with the highest value at the top. If you don't see that column, select
View ▹ Columns ▹ Real Memory
from the menu bar.
If one process (excluding "kernel_task") is using much more memory than all the others, that could be an indication of a leak. A better indication would be a process that continually grabs more and more memory over time without ever releasing it.
If you don't have an obvious memory leak, your options are to install more memory (if possible) or to run fewer programs simultaneously.
The next suggestion is only for users familiar with the shell. For a more precise, but potentially misleading, test, run the following command:
sudo leaks -nocontext -nostacks process | grep total
where process is the name of a process you suspect of leaking memory. Almost every process will leak some memory; the question is how much, and especially how much the leak increases with time. I can’t be more specific. See the leaks(1) man page and the Apple developer documentation for details:
Memory Usage Performance Guidelines: About the Virtual Memory System -
Hi everyone!
I have spent several hours by reading various forums but haven’t found any definitive answers.
I have a 12 Core Mac Pro with the following setup: one 1TB SATA hard drive that carries the system and applications. For the files and storage there are three 2TB SATA drives in RAID 5 controlled by Apple RAID card. I am going to install a 512 GB Samsung 840 Pro SSD drive in the optical bay and have initially planned to use it just for the system and applications, but am curious if the following is possible.
1) Is it possible to combine the RAID 5 array with the SSD and create a Fusion drive?
2) If yes, will it retain all the features of the RAID 5?
3) Should TRIM be enabled?
Thank you in advance!TRIM directly addresses the shortcomings of having only garbage collection available. SSD controller manufacturers and designers (including SandForce, the controller manufacturer for OWC's SSDs), recommends that TRIM be used with their products. So does Samsung.
For example, here's a 2011 article from OWC describing how you don't need TRIM on their SSDs and how it can in fact hurt performance or reliability.
That article has been discussed here on MacInTouch before. In my opinion it's bad advice, and inaccurate in some of its assertions. It also ignores the recommendation made by SandForce to use TRIM with their SSD controllers. But even if one were to take that article at face value, applying that advice to SSDs other than OWC's makes little sense.
The reason I'm advising against TRIM is simply that it's yet another driver-level modification of the OS, and these always carry potential risk (as all the folks with WD hard drives who lost data can attest to).
Apples and oranges comparison, for a variety of reasons. The short of it is that TRIM is supported natively in all recent versions of OS X. The tools used to enable it for third party SSDs do not add a new kernel extension; they change the setting to allow Apple's native TRIM implementation to be used with SSDs other than those factory installed by Apple.
This shows that the 840s do work slightly better with TRIM than without, but the differences are (in my opinion) trivial, a 9% increase at best.
One of the major reasons for the skepticism that exists about TRIM is that so many people, the authors of both articles you linked to included, don't understand it.
TRIM is not, strictly speaking, a performance-enhancement technology -- though it is plainly obvious that most people think it is.
Though it can, in many circumstances, improve performance, there are also circumstances under which it will provide little or no noticeable benefit. Not coincidentally, a new SSD tested fresh out of the factory packaging is unlikely to show much (if any) benefit. Or rather, TRIM is providing a real benefit for new SSDs, but that benefit doesn't become measurable in terms of benchmark performance testing until every memory cell in the SSD -- including many gigabytes of cells hidden from visibility by the SSD controller -- have been written to at least once. Writing 128 GB of files to an SSD with a nominal capacity of 128 GB won't do it, as there are several gigabytes (exact number varies depending on the model) still unwritten.
Under real-world use conditions, having TRIM disabled means eventually having noticeable write performance degradation due to write amplification. It is far greater than "9%" -- it can be a 50% or greater drop in write performance, depending on various factors. Defining "eventually" is difficult because it depends on how the SSD is used. But given enough time and write cycles, it can happen to all SSDs used without TRIM, no matter how sophisticated their garbage collection algorithms are.
Under those same real-world use conditions, having TRIM enabled means that the SSD should almost never reach a state of having noticeable write performance degradation, as it should almost never get into a state where write amplification is happening.
I will concede that it is possible to design a lab test in such a way as to defeat the benefits provided by TRIM, but such tests do not reflect any real-world usage scenario I can imagine. Furthermore, those same contrived tests would put an un-TRIMmed drive into an equally-addled state even more quickly.
I would suggest reading through the rather lengthy previous discussions about TRIM. Here are a couple of my past posts that are most relevant to the current discussion:
A description of what TRIM is here.
I addressed some of OWC Larry's comments about TRIM use with OWC/SandForce SSDs here.
http://www.macintouch.com/readerreports/harddrives/index.html#d09dec2013 -
Installing Windows 7 on Late 2013 iMac w/ Fusion Drive
Sorry in advance for the long post, but I have tried to exhaust all possibilities, and bring as much knowledge about our environment to the table to avoid confusion.
Here's our goal: Install Mac & Windows on a Late 2013 iMac with a 1TB Fusion Drive
Install our Mac Image with Deepfreeze on Partition 1
Install our Windows 7 x64 Image with DeepFreeze on Partition 2
Here's why our goal cannot work out of the box:
Deepfreeze for Mac, is not supported on a Fusion Drive. Now before anyone says "just don't use deepfreeze"...we are using it, and that is that.
In order to get our existing image to work on the iMac, we had to split the Fusion Drive.
Splitting Up the Fusion Drive
We booted into Recovery, Opened up terminal, retrieved the LvGUID, deleted it, and split up the SSD from the HD.
So now, we have a 128GB SSD, and 1TB HD showing up under Diskutilitiy.
We then partitioned the 1TB HD, into two, 500GB Partitions. One for Mac OSX 10.9.4, and the other for Windows.
The 128GB SSD is going to be used for scratch space, temp, etc. And is irrelevant at this time.
Deploying our Mac Image
After splitting the Fusion Drive, we netbooted and installed a "NetRestore" of our image. Worked completely fine, no issues. DeepFreeze Works fine, the 128GB SSD shows up just fine, and the other 500GB Windows Partition shows up fine. All drives / partitions can be written to with no problem.
Deploying our Windows Image
Deployed our Windows Partition image as we have done in the past, by booting into a windows PE Disk. (We have other various 2009, 2010, and 2011 iMacs across campus, with NO FUSION DRIVES installed, and dual boot them successfully using the same procedure. Minus the splitting of the fusion drive part of course) After the Windows image is deployed to the windows partition, we then boot it up to a Windows 7 Install disk to fix the MBR, Bootrec, and BCD options to allow it to boot properly. Here's where we run into issues: Upon getting the Windows 7 Install screen, the USB Keyboard and Mouse, DO NOT WORK.
Here's the options we've tried to get them to work properly
1. Tried another known working Mac USB Keyboard & Mouse = Failed
2. Tried a known working Windows Keyboard & Mouse = Failed
3. Plugged Just a known working Mac Keyboard into each USB Port to see if recognized = Failed
4. Plugged Just a known working Windows Keyboard into each USB Port to see if recognized = Failed
5. Plugged Just a known working Mac Mouse into each USB Port to see if recognized = Failed
6. Plugged Just a known working Windows Mouse into each USB Port to see if recognized = Failed
7. A Windows 8.1 Recovery USB will boot and the USB Mouse & Keyboard are recognized and installed! (YAY!!) However, we cannot repair a Windows 7 install with Windows 8.1..
BootCamp Drivers & Support Media
Downloaded the Current BootCamp Support drivers to enable the USB and other various drivers to be loaded during setup (Placed the $WinPEDriver$ and AutoUnattend.xml, and BootCamp folder on the Root of a USB, and modified a Windows7 Installation disk and placed on the root as well) The drivers do not load. Have also placed on a brand new USB2, and USB3 flash drive formatted at FAT32, to see if that made a difference, which it did not. The BootCamp USB made within Mac, it loads saying "Now booting into Boot Camp Assistant Created USB Drive..." or something like that (Don't remember the exact Message)
Side Note:
Restored Fusion Drive to its original State, and booted from the BootCamp USB drive, still no usb Mouse & Keyboard Support.I have same issue
Tried everything differend hdd,ssd as well
Basically when trying instal win 7 via iOS maverick when reboting and windows booting to the first scree everything freezing cant do much.
Also tried install clear ssd without any system, but soon after format ssd or hdd I have error that I cant use this disk to install windows!!!!!!!!!!!!!!!!!
What is funny Windows 8 installing without any problem!!!
what is going on APPLE??wher is support
This issue I have only on Late 2013 on my other Late 2012 this issue not exist and everything working as should. -
I have a MacBookPro 9,1 (mid-2012, non-retina) running OS X 10.8.2. Here is what I have done to my system:
Installed Windows 7 x64 Pro to a boot camp partition; installed all windows updates.
Using WinClone, save an image of this boot camp partition.
Removed optical drive and HDD.
Installed HDD in place of optical drive.
Installed SSD in place of HDD.
Booted to recovery partition, installed OS X on a flash drive.
Booted to flash drive, created fusion drive using [MacWorld's instructions](http://www.macworld.com/article/2014011/how-to-make-your-own-fusion-drive.html)
Booted to recovery partition on flash drive.
Restored system to fusion drive from a Time Machine backup. Unfortunately, it seems that because I never installed OS X on my fusion drive, I do not have a recovery partition. But that's an issue for another day.
Using Boot Camp assistant, created a boot camp partition on my HDD.
Using WinClone, restore my Windows installation from the previously created image.
Now, Windows boots to a black screen telling me that it can't find a bootable device. I have tried a few things to resolve this, all without effect:
I know that VMware Fusion has to prepare a boot camp partition in order to virtualize it, so I figured it might inadvertently fix things. Alas, while it *did* successfully boot my boot camp partition into a virtual machine, I still can't boot into Windows.
I figured I'd just try to reinstall Windows. Surprisingly, my system booted to my Windows install disc, which was in my original optical drive (which I had put in a USB case). But, Windows refused to install, giving me a an error 0x8030024. It seems the solution to this issue is to disconnect all drives but the one on which you want to install Windows, which is something I would dearly like to avoid. It would be a pain, but more than that, I'm afraid it would bork my fusion drive, even if I'm careful to never boot to OS X with the SSD disconnected.
A lot of places said that this error results from a borked MBR, and suggest using a tool like gptfdisk to rewrite it. I followed the instructions [here](https://discussions.apple.com/thread/4144252?start=0&tstart=0), but *that* didn't work either.
I am now completely at a loss as to how to proceed, and Google isn't much help either.
In conclusion, here is some information that you may find helpful:
$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *240.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_CoreStorage 239.7 GB disk0s2
3: Apple_Boot Boot OS X 134.2 MB disk0s3
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *750.2 GB disk1
1: EFI 209.7 MB disk1s1
2: Apple_CoreStorage 648.4 GB disk1s2
3: Apple_Boot Boot OS X 650.0 MB disk1s3
4: Microsoft Basic Data BOOTCAMP 100.9 GB disk1s4
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Mayfly *884.0 GB disk2
$ diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group 63DC419F-1A09-4C5B-977A-F59F79502CA1
=========================================================
Name: FusionDrive
Size: 888087773184 B (888.1 GB)
Free Space: 0 B (0 B)
|
+-< Physical Volume B1B14251-2DB3-491C-9E7A-5C2FD11881BA
| ----------------------------------------------------
| Index: 0
| Disk: disk0s2
| Status: Online
| Size: 239713435648 B (239.7 GB)
|
+-< Physical Volume D0BA2837-514D-4620-8E1D-26D18137CA94
| ----------------------------------------------------
| Index: 1
| Disk: disk1s2
| Status: Online
| Size: 648374337536 B (648.4 GB)
|
+-> Logical Volume Family 736A8900-FE9C-4342-A932-EDC35444774C
Encryption Status: Unlocked
Encryption Type: None
Conversion Status: NoConversion
Conversion Direction: -none-
Has Encrypted Extents: No
Fully Secure: No
Passphrase Required: No
|
+-> Logical Volume B4997853-59F8-4480-BB48-3481B2F2A123
Disk: disk2
Status: Online
Size (Total): 884000030720 B (884.0 GB)
Size (Converted): -none-
Revertible: No
LV Name: Mayfly
Volume Name: Mayfly
Content Hint: Apple_HFS
$ sudo gpt -r -vv show disk1
Password:
gpt show: disk1: mediasize=750156374016; sectorsize=512; blocks=1465149168
gpt show: disk1: Suspicious MBR at sector 0
gpt show: disk1: Pri GPT at sector 1
gpt show: disk1: Sec GPT at sector 1465149167
start size index contents
0 1 MBR
1 1 Pri GPT header
2 32 Pri GPT table
34 6
40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
409640 1266356128 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC
1266765768 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
1268035304 280
1268035584 197111808 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
1465147392 1743
1465149135 32 Sec GPT table
1465149167 1 Sec GPT header
$ sudo fdisk /dev/disk1
Disk: /dev/disk1 geometry: 91201/255/63 [1465149168 sectors]
Signature: 0xAA55
Starting Ending
#: id cyl hd sec - cyl hd sec [ start - size]
1: EE 0 0 2 - 1023 254 63 [ 1 - 1268035583] *2: 07 1023 254 63 - 1023 254 63 [1268035584 - 197111808] HPFS/QNX/AUX
3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
4: 00 0 0 0 - 0 0 0 [ 0 - 0] unusedMy setup is very similar to your's, Ryan, on a Mac Mini5,2 and the ordering is different and Winclone was not used.
1. New Mini with internal 500GB with Mountain Lion(ML), put into an external FW enclosure, so the Mini can/could be booted using an external drive for contigency.
2. Replaced internal stock HDD (500Gb/5400rpm) with SSD/HDD (256Gb SSD/1TB 5400rpm).
3. Installed W7 x64 on 64GB partition on HDD, which was a single-partition drive to begin with.
4. The remaining HDD partition and the entire SSD was put into a Fusion drive.
5. Using Command-R, new ML installed on Fusion HD.
Here is what I currently have...(Disk0 - SSD, Disk1- 1TB HDD, Disk2 - Fusion, Disk3 - External FW).
diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *256.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_CoreStorage 255.7 GB disk0s2
3: Apple_Boot Boot OS X 134.2 MB disk0s3
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk1
1: EFI 209.7 MB disk1s1
2: Apple_CoreStorage 934.5 GB disk1s2
3: Apple_Boot Boot OS X 650.0 MB disk1s3
4: Microsoft Basic Data BOOTCAMP 64.9 GB disk1s4
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Fusion HD *1.2 TB disk2
/dev/disk3
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk3
1: EFI 209.7 MB disk3s1
2: Apple_HFS Rescue HD 371.8 GB disk3s2
3: Apple_HFS Leopard HD 31.9 GB disk3s3
4: Apple_HFS Snow Leopard HD 31.9 GB disk3s4
5: Apple_HFS Lion HD 31.3 GB disk3s5
6: Apple_Boot Lion Recovery HD 650.0 MB disk3s6
7: Apple_HFS Mountain Lion HD 31.3 GB disk3s7
8: Apple_Boot Mountain Lion Recove... 650.0 MB disk3s8
diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group A8C00490-0E14-401F-AB69-59F37724E8C4
=========================================================
Name: Fusion
Size: 1190201270272 B (1.2 TB)
Free Space: 0 B (0 B)
|
+-< Physical Volume 4772013B-5520-4801-9BE5-BCAEF4AEDAB3
| ----------------------------------------------------
| Index: 0
| Disk: disk0s2
| Status: Online
| Size: 255716540416 B (255.7 GB)
|
+-< Physical Volume A679A101-3C78-4A59-B5EE-A4339210CFAD
| ----------------------------------------------------
| Index: 1
| Disk: disk1s2
| Status: Online
| Size: 934484729856 B (934.5 GB)
|
+-> Logical Volume Family 5EF5C7CA-0B9C-4169-82A1-41C84F206672
Encryption Status: Unlocked
Encryption Type: None
Conversion Status: NoConversion
Conversion Direction: -none-
Has Encrypted Extents: No
Fully Secure: No
Passphrase Required: No
|
+-> Logical Volume 1512657C-ED13-4B31-82C6-7AECBBCA7F98
Disk: disk2
Status: Online
Size (Total): 1185508581376 B (1.2 TB)
Size (Converted): -none-
Revertible: No
LV Name: Fusion HD
Volume Name: Fusion HD
Content Hint: Apple_HFS
sudo gpt -r -vv show disk1
gpt show: disk1: mediasize=1000204886016; sectorsize=512; blocks=1953525168
gpt show: disk1: Suspicious MBR at sector 0
gpt show: disk1: Pri GPT at sector 1
gpt show: disk1: Sec GPT at sector 1953525167
start size index contents
0 1 MBR
1 1 Pri GPT header
2 32 Pri GPT table
34 6
40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
409640 1825165488 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC
1825575128 1269544 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
1826844672 126679040 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
1953523712 1423
1953525135 32 Sec GPT table
1953525167 1 Sec GPT header -
Can I bootcamp Windows on SSD instead of Fusion Drive?
Hi guys,
I have a base retina iMac which I have boot camp Windows 8.1 on it. However, I would like to know if I can improve the performance of Windows 8.1, like installing Windows 8.1 on SSD part instead of HDD?
If not, how can I improve the performance of windows 8 on fusion drive?
thanksHi, Sorry for the late reply...
Here's what I got...
diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *121.3 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_CoreStorage 121.0 GB disk0s2
3: Apple_Boot Boot OS X 134.2 MB disk0s3
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_CoreStorage 441.5 GB disk1s2
3: Apple_Boot Recovery HD 650.0 MB disk1s3
4: Microsoft Basic Data BOOTCAMP 557.8 GB disk1s4
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Macintosh HD *557.0 GB disk2
Logical Volume on disk0s2, disk1s2
4AF164C1-45E3-48A3-93CA-51CE5DF7011A
Unencrypted Fusion Drive
diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group E97FFD32-8648-4CA3-B8E8-44589594E6F8
=========================================================
Name: Macintosh HD
Status: Online
Size: 562498494464 B (562.5 GB)
Free Space: 0 B (0 B)
|
+-< Physical Volume 474F7386-3E05-4500-ADAB-5F91269183B6
| ----------------------------------------------------
| Index: 0
| Disk: disk0s2
| Status: Online
| Size: 120988852224 B (121.0 GB)
|
+-< Physical Volume 7ACB35A3-83FA-4572-99C2-16F1FA925A48
| ----------------------------------------------------
| Index: 1
| Disk: disk1s2
| Status: Online
| Size: 441509642240 B (441.5 GB)
|
+-> Logical Volume Family BA6AFD64-62E4-4230-ACD5-D3256A3D0347
Encryption Status: Unlocked
Encryption Type: None
Conversion Status: NoConversion
Conversion Direction: -none-
Has Encrypted Extents: No
Fully Secure: No
Passphrase Required: No
|
+-> Logical Volume 4AF164C1-45E3-48A3-93CA-51CE5DF7011A
Disk: disk2
Status: Online
Size (Total): 557000032256 B (557.0 GB)
Conversion Progress: -none-
Revertible: No
LV Name: Macintosh HD
Volume Name: Macintosh HD
Content Hint: Apple_HFS -
Trouble with iMac and Fusion Drive
Hello, I recently tried installing Windows 8.1 via Boot Camp on my Retina iMac. The install was unsuccessful, so I went to Boot Camp and deleted the partition. After that, I realized I was not able to access that space on the HDD. Reading around, I ended up deleting the Logical Volume, and breaking the Fusion Drive into 2 separate drives. I have tried to consolidate them again using Disk Utility from recovery, but I keep getting an error. After this, I tried it within Terminal. I keep getting an error that the drive cannot be unmounted. Can anyone shed light onto why this may be, and how to fix the issue? I appreciate any help I can get.
I figured it out, made a bootable USB, booted to that, then rebuilt the Fusion Drive inside Disk Utility.
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