Seagate 3TB HDD

Regarding a 3,5" HDD for an iMac, 27", 3,06 GHz Processor, EMC Number 2309. It was shiped with a 1TB SEAGATE Barracuda 7200 RPM drive. I would like to ask if the following HDD 3.0TB Seagate Barracuda 7200RPM SATA 64MB Cache 6Gb/s HDD would fit into my iMac.

Hi,
no, the 3TB HDD did not work. The iMac did not recognise the 3 TB HDD - if I remember correctly (it was a long time ago!) the iMac only recognised 640 GB. I exchanged it for a 2 TB Seagate HDD with thermal pins. BUT - that's Apple for you - it did not have the Apple firmware. So the iMac booted, worked well - for about 10 minutes and then the HDD fan went on full blast, obviously creating a lot of noise. The only work-around solution was HDD Fan Control Version 2.4 - downloaded from http://www.hddfancontrol.com. After installation, the iMac ran smoothly without noise pollution.
Since then I have changed to another iMac with a SSD (250 GB) and a HDD (2 TB), 16 GB RAM. The machine is so wonderfully fast that I am not even interested in looking at the newer iMacs, which would be so expensive in comparison with the iMac that I have.
I hope it helped. Nice hearing from you after such a long time.
Kind regards.
PS I hope Apple will not censor this posting.

Similar Messages

AMD storage controller problems with a 3tb HDD

I recently bought a Seagate 3tb HDD to use as extended / secondary storage. It seems that AMD has not updated its storage controller to recognize >2tb yet. I cannot find drivers for my chipset anywhere at least. And it seems that noone running an AMD chipset is upgrading HDD's past 2tb? I know Intel came out with an update for their controller that fixed this problem. Is anything available for the AMD controller like this?
Hp Pavilion HPE H8-1214
MS Windows 7 Home Premium 64-bit SP1
AMD FX-6100 6 core processor
10 Gigs Ram
Gigabyte 2AC8 Mothermoard
AMD Radeon HD 7700 Series Gfx
1465GB Seagate ST1500DL003-9VT1 SCSI Disk Device (RAID) Primary (HP installed)
2930GB Seagate ST3000DM001-1CH1 SCSI Disk Device (RAID) Secondary (the problem drive)
Gigabyte has no mention of this Motherboard existing on their support site.
AMD has nothing about their Storage Controllers on theirs.
I can see all 3tb in Disk Management, but i cannot partition past 2.2tb. The last 746.52Gb will be unusable.
AMD AHCI compatible RAID Controller driver version is 3.3.1545.14 and Microsoft says that it is the most up-to-date
Any help with this would be great. Thanks!
This question was solved.
View Solution.

Hi:
Here is the link to the latest AMD SATA RAID drivers. Second file on the list.
http://support.amd.com/en-us/download/chipset?os=Windows%207%20-%2064
That would be all the help I can offer because I don't know why all 3 TB of the drive can't be seen in one big partiton unless you didn't format it in GPT.
In order for all 3 TB to be seen in one partition, the drive has to be formatted in GPT.
Here is a HP white paper on GPT from a business PC...
http://h20565.www2.hp.com/portal/site/hpsc/template.BINARYPORTLET/public/kb/docDisplay/resource.proc...

Problems with seagate external hdd

I have a Seagate 3TB external HDD attached to my iMac via a Firewire 800 cable. I have the latest software running (Yosemite 10.10.3) but the Mac no longer shows the HDD in finder, I can see it in disk utility but when i come to verify or repair the disk i get this message
" Error: Partition map check failed because no slices were found" I also get this message:
Verifying volume “Seagate External Drive”Verifying file system.Checking Journaled HFS Plus volume.Invalid B-tree node sizeThe volume Seagate External Drive could not be verified completely.File system check exit code is 8.Error: This disk needs to be repaired. Click Repair Disk.
The drive is nearly full and I really don't want to lose any files, can anyone help please..

Hi Brian
Connect the External HD directly up to one of the iMac's and follow the Formatting and Partitioning instructions in Ken's article: (but note that doing so will erase the data on the drive)
Ken Stone's article: http://www.kenstone.net/fcphomepage/partitioningtiger.html
It's sounding more like your trouble is with network sharing than format, if so have a look
at: http://support.apple.com/kb/HT1549
and: http://db.tidbits.com/article/9261
Dennis

3TB HDD, GPT, EXT4 HPA enabled, [SOLVED]

I started my HTPC as usual, only to be greeted with "movie share" not found. I was suprised, looking at console, it seemed the kernely suddently stopped looking for my HDD.
Manually mounting the HDD
mount -t ext4 /dev/sdg1 /mnt
mount: special device /dev/sdg1 does not exist
fdisk /dev/sdg
Disk /dev/sdg: 3000.6 GB, 3000591900160 bytes, 5860531055 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdg1 1 4294967295 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
dmesg | grep sdg
8.035214] sd 8:0:0:0: [sdg] 5860531055 512-byte logical blocks: (3.00 TB/2.72 TiB)
[ 8.035217] sd 8:0:0:0: [sdg] 4096-byte physical blocks
[ 8.035280] sd 8:0:0:0: [sdg] Write Protect is off
[ 8.035282] sd 8:0:0:0: [sdg] Mode Sense: 00 3a 00 00
[ 8.035306] sd 8:0:0:0: [sdg] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 8.090129] sdg:
[ 8.090458] sd 8:0:0:0: [sdg] Attached SCSI disk.
stat /dev/sdg1
stat: cannot stat /dev/sdg1: No such file or directory
Also ran testdisk, tried the analyze, it said all okay, tried rebuilding partition structure. I think maybe that's why it's now complaining about "Error: Can't have a partition outside the disk!"
sudo parted /dev/sdg unit s print
Error: Can't have a partition outside the disk!
Model: ATA ST3000DM001-1CH1 (scsi)
Disk /dev/sdg: 5860531055s
Sector size (logical/physical): 512B/4096B
Partition Table: unknown
Disk Flags:
I've read this guide: http://gparted.sourceforge.net/h2-fix-msdos-pt.php
Thanks to iranshaksi on IRC, very friendly and kind fellow. But i'm still puzzled what to do.
It's a fresh HDD, couple of weeks old, seagate 3TB, partioned with GPT/EXT4. I have over 300GB stored of PERSONAL video files on this HDD.
Please is there away at all to get access to my files? I just want to transfer the files I have on the hdd onto another one.
And perhaps re-partion this HDD. How can a hdd just stop working like this?
Is there a "magical" way i'm suppose to partition a 3TB hdd? My other 3TB works just fine. I'm quite puzzled here gentlemen
Last edited by greenfish (2013-10-24 09:12:54)

graysky wrote:Anything in dmegs about errors? You sure it's still /dev/sdg1? Post the output of `lsblk -f` In the future, you might want to consider using labels or UUIDs for mounting since drive letters can change if you add/remove a device or if something changes in the BIOS, etc. Labels are better in my opinion because you name them whereas UUIDs are meaningless to the user.
Yes sir, it's the only HDD that refuses to mount. Tried it on my other linux box as well.
fdisk -l | less
Disk /dev/sda: 1000.2 GB, 1000204886016 bytes, 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0xe81808b3
Device Boot Start End Blocks Id System
/dev/sda1 63 1953520064 976760001 83 Linux
Disk /dev/sdb: 4022 MB, 4022337024 bytes, 7856127 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x43756644
Device Boot Start End Blocks Id System
/dev/sdb1 * 0 1077247 538624 0 Empty
/dev/sdb2 4728 68215 31744 ef EFI (FAT-12/16/32)
Disk /dev/sdb1: 551 MB, 551550976 bytes, 1077248 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x43756644
Device Boot Start End Blocks Id System
/dev/sdb1p1 * 0 1077247 538624 0 Empty
/dev/sdb1p2 4728 68215 31744 ef EFI (FAT-12/16/32)
Disk /dev/sdc: 1500.3 GB, 1500301910016 bytes, 2930277168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x31f60035
Device Boot Start End Blocks Id System
/dev/sdc1 63 2930272064 1465136001 83 Linux
Disk /dev/sdd: 1000.2 GB, 1000203804160 bytes, 1953523055 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdd1 63 1953520064 976760001 83 Linux
Disk /dev/sde: 3000.6 GB, 3000592982016 bytes, 5860533168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sde1 1 4294967295 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
Disk /dev/sdf: 160.0 GB, 160040803840 bytes, 312579695 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000c4ba1
Device Boot Start End Blocks Id System
/dev/sdf1 2048 293603327 146800640 83 Linux
/dev/sdf2 293603328 312579694 9488183+ 83 Linux
Disk /dev/sdg: 3000.6 GB, 3000591900160 bytes, 5860531055 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdg1 1 4294967295 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
Disk /dev/mapper/arch_root-image: 1561 MB, 1561329664 bytes, 3049472 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
root@archiso ~ # stat /dev/sdg1
stat: cannot stat â/dev/sdg1â: No such file or directory
1 root@archiso ~ # stat /dev/sdg1
stat: cannot stat â/dev/sdg1â: No such file or directory
1 root@archiso ~ # stat: cannot stat dev/sdg1 No such file or directory
zsh: correct 'stat:' to 'stat' [nyae]? n
zsh: command not found: stat:
127 root@archiso ~ # sudo fdisk -l | less
/dev/sdc1 63 2930272064 1465136001 83 Linux
Disk /dev/sdd: 1000.2 GB, 1000203804160 bytes, 1953523055 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdd1 63 1953520064 976760001 83 Linux
Disk /dev/sde: 3000.6 GB, 3000592982016 bytes, 5860533168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sde1 1 4294967295 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
Disk /dev/sdf: 160.0 GB, 160040803840 bytes, 312579695 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000c4ba1
Device Boot Start End Blocks Id System
/dev/sdf1 2048 293603327 146800640 83 Linux
/dev/sdf2 293603328 312579694 9488183+ 83 Linux
Disk /dev/sdg: 3000.6 GB, 3000591900160 bytes, 5860531055 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdg1 1 4294967295 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
Disk /dev/mapper/arch_root-image: 1561 MB, 1561329664 bytes, 3049472 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Log file is already in use (press RETURN)
dmesg http://bpaste.net/show/142956/
Tried:
dmesg | grep EE
dmesg | grep WW
dmesg | grep /dev/sdg*
Didn't see anything useful.
lsblk -f
NAME FSTYPE LABEL UUID MOUNTPOINT
sda
ââsda1 ext4 1TB-D fc268167-056f-4e5b-9e02-74626236a500 /mnt/1
sdb iso9660 ARCH_201308 2013-08-01-08-13-08-00
ââsdb1 iso9660 ARCH_201308 2013-08-01-08-13-08-00 /run/archiso/bootmnt
ââsdb2 vfat ARCHISO_EFI 8567-F798
sdc
ââsdc1 ext4 1.5TB-F 0fba37d8-a29a-4214-a5b7-f725de4bbb4e /mnt/2
sdd
ââsdd1 ext4 1TB-C d5651eb3-6e63-4e27-a13d-a02eb13983c6 /mnt/3
sde
ââsde1 ext4 7d7c8734-b060-4715-a867-3886dddf54e6 /mnt/4
sdf
ââsdf1 ext4 87c51044-75cf-496c-9733-936047c5ec18
ââsdf2 swap 2cfb72c0-4d1e-450c-a807-6875fa094543
sdg
loop0 squashfs /run/archiso/sfs/root-image
loop1 ext4 46e2ebd2-7640-49d1-89e9-a45d6e236fa7
ââarch_root-image ext4 46e2ebd2-7640-49d1-89e9-a45d6e236fa7 /
loop2 ext4 46e2ebd2-7640-49d1-89e9-a45d6e236fa7
ââarch_root-image ext4 46e2ebd2-7640-49d1-89e9-a45d6e236fa7 /
Yeah I usually rely on UUID, but I had to make a fresh arch install, that's why they are using deviceid instead of uuid.
Thank You
Last edited by greenfish (2013-10-22 20:39:50)

My laptop fails to read a seagate external HDD

Hello!
I recently tried to use a Seagate external HDD with my laptop and although the installation was successful, a message appears saying: "Location is not available. H:/ is not accessible. Access is denied."
The HDD is installed properly (the driver is shown in Drivers List) and its status on Disk Management appears to be online.
I tried the HDD in an other Computer and in a TV and it works perfectly.
I had the same problem with another Seagate external HDD a few days ago, but back then I thought I was circumstantial.
Is there anything I can do?
Thanks in advance!

Unfortunately, Mavericks is having plenty of issues with Time Machine.
If your Mac is backing up OK to the Time Capsule, try resetting Time Machine Preferences / Options by adding the external hard drive back onto to the list of Excluded items, then saving the changes, and then closing the preferences window.
Wait a minute and then open up Time Machine Preferences / Options once more and them remove the drive again from the list of Excluded items.....which tells Time Machine to back it up, and then Save the changes.
We're trying to avoid having to delete the Time Machine Preferences file here, since doing that will force you to set up Time Machine all over again......but it may be necessary.

System will not boot with Seagate 3Tb expansion drive plugged in.

I have a HP Pavilion HPE h8- 1214 Desktop , I recieved a Seagate 3TB expasion drive as a gift but when plugged in, the system will not boot. It turns on but thats it. It never gets to the boot sequence. I have it plugged into the top 3.0 usb slot and have tried all of the other slots as well with no sucess. But if I leave it unplugged the system boots right up. I can then plug it in and it works fine. I have plugged it into my wifes HP All- In- One and it boots fine and works. I have a WD 2TB drive that works fine as well on my system . I have searched Segates support for hours and all they say is to change the boot sequence. Have tried that, no go. What they dont get is no matter what I do if that drive is plugged in it never gets as far as booting and reading the boot sequence. Please help. Thank you!

Hi NcBunky,
Are you using Win 7 64 bit? Did you update the Texas Instruments (TI) USB 3.0 XHCI Host Controller?
I have an H8 1380t PC. Updated the TI USB 3.0 driver and had the same problem.
When booting the PC with the USB 3.0 external drive connected to the PC the PC would not boot. When booting the PC with only the mouse, keyboard, and a USB 2.0 external drive attached the PC would boot. Once booted you could attach the USB 3.0 drive and it worked fine.
Solution was to roll back (reinstall) the TI USB 3.0 XHCI Host Controller to the original factory installed driver.
System now boots with the external USB 3.0 drive attached.
Jaco
****I am not an HP employee****
Please give a" Kudos" if advice received is relevant or" Accept as Solution" if your problem has been solved.
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Errare humanum est.

Cannot install OS X Lion after new seagate hybrid HDD install

I just installed new seagate hybrid hdd (STBD1000400) in my early 2011 13" Mac Book Pro after stock drive failed;
formatted it as mac os extended (journaled);
downloaded lion installer and copied it to external with OS X Lion bootable drive;
started computer from external drive;
ran lion installer;
"Install Failed: OS X could not be installed on your computer. OS X can't be installed on the disk (null) because a recovery system can't be created. Visit www.apple.com/support/no-recovery to learn more"
I reduced partition size and same error. Any suggestions

Remove the SSd from inside the case and connect it to that same Mac with a SATA to USB adapter, one that has its own AC power supply (Not a USB BUS power adapter), and try to install Lion on it.
I am suspecting the cable that goes from the drive to the logic board is faulty which is very common.
If the drive works fine outside the system, IE you can install Lion on it and it creates the Recovery HD partition and you can boot and run the system from it then is is more than likely the cable.
One other thing to do is after you Repartition the drive in disk utility grab the bottom right hand corner of the partition layout area and drag it up a little shrinking that partition by a couple of 100MBs to 1-2GBs and try the install again.
There was a bug in some Macs that for some reason with the whole drive included in the primary partition the OS X installer couldn't create a Recovery HD. You don't have to create a second partition, you can just leave it as Free Unpartitioned space. If you can then successfully install Lion you can then Drag the corner back down to put the free unpartitioned space back into the main partition.

In which folder of my Seagate 3TB external hard drive, can I find my iPhoto photos from my iMac (iOS X Maverick)?

In which folder of my Seagate 3TB external hard drive, can I find my iPhoto photos from my iMac (iOS X Maverick)?

tlah wrote:
The Seagate 3TB external hard drive backs up the entire internal hard drive of the iMac.
Is this external drive a Time Machine backup?
Then find what you want using Time Machine (or whatever application you used to make the backup).
Your iPhoto pictures are in the iPhoto library in Users/Pictures.

How to Install Win7 on a 3TB hdd using GPT

Hi!
I'd like to change the HDD of my Thinkcentre Edge 72 from the original 500GB to a 3TB HDD.
Can please somebody tell me, how I can install the original Win7 Pro levnovo version (with the recovery DVDs) back on the new HDD (partitioned in GPT)?
Many thanks in advance!
Bye
Chris
Solved!
Go to Solution.

I thought I would post a reply to this older thread as there is a new tip released from our engineering that might apply. I don't believe capacity points of the drive are a key factor here as much as GPT not working with Win 7 and the recovery DVDs.
The system is installed with the Microsoft Windows 7 operating system. When using the Recovery disc set to restore the system to the factory-default settings, when selecting the GUID Partition Table (GPT) partition style, the system cannot be restarted after the Recovery process finishes. As a result, the system cannot be restored to the factory-default settings.
This happens because the Basic Input/Output System (BIOS) of the system does not support the GPT partition style on the Windows 7 operating system. To solve this issue, select the Master Boot Record (MBR) partition style to restore the computer to factory-default settings.
Best regards,
Mark
ThinkPads: S30, T43, X60t, X1, W700ds, IdeaPad Y710, IdeaCentre: A300, IdeaPad K1
Mark Hopkins
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Canvio 3TB HDD not recognized by other Devices

I am trying to connect this Canvio 3TB HDD to my Samsung TV and its not recognized. Tried connecting to the Samsung BRDVD player, not recognized. These devices recognize other HDD's but not this one. Any suggestions?

Yes, that should be fine. It would just operate slower usually. Do your devices recognize other drives that have that large of a capacity? Perhaps they can't see it because 3 TB is more than they support. I don't know for sure though. You may always want to contact Samsung.
- Peter

OS X Disk Utility not recognizing Seagate 3TB drive in dock

Model Nhjgjhgjhgh
OS X Disk Utility not recognizing Seagate 3TB drive in dock
Been scouring the webs and can't quite figure this one out.
I just purchased a Seagate 3TB drive intending on using it for Backup.
Ended up plugging it into a dock and couldn't get it to show up in Disk Utility..
Interesting enough, I plugged this into an HP laptop and it displays just fine.
Anyone know the solution?
OS X 10.10 Yosemite, MacBook Pro (Retina, 15-inch, Early 2013)
Hardware Overview:
Model Name: MacBook Pro
Model Identifier: MacBookPro10,1
Processor Name: Intel Core i7
Processor Speed: 2.6 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 6 MB
Memory: 16 GB
Boot ROM Version: MBP101.00EE.B05
SMC Version (system): 2.3f36

I hooked my internal as an external up to my Mom's Macbook Pro and it recognized my HD. I'm thinking it is something internal with the hook-up, which is awesome, because maybe I can actually fix it!!!! Any thoughts?

3TB HDD installed in HP S5360f Need BIOS Update

The original drive crashed and I replaced it with a Toshiba 3TB HDD. Now the system will boot up and run for a bit, but then freezes. The OS and the system setup screens both only recognize the new 3TB drive as being 800GB. Other support forums state that I need to update the BIOS, but I cant find it on the HP site.
What's the best way to proceed from here?
DattGuy

DattGuy, welcome to the forum.
Here is a guide for running 3 TB hard drives with Win 7. Also, here is a BIOS update for the computer. It will not address the problem that you are experiencing, however.
Please click the "Thumbs Up+ button" if I have helped you and click "Accept as Solution" if your problem is solved.
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Time machine backup fails in my seagate 3tb external drive

Time machine backup fails in my seagate 3tb external drive

Without any specifics it's impossible to assist you, however the best tool for debugging TM failures is using Pondini's Time Machine Troubleshooting guide.
Good luck.

FRUSTRATED! Cannot access Seagate external HDD - message is "the disk you inserted was not readable by this computer"

I get the message "the disk you inserted was not readable by this computer" when trying to access my Seagate external HDD.
Disk Utility lists both the Seagate drive and volume but all options (verify disk, repair disk) are greyed out.
It says the volume is unmounted and Windows_FAT_32.
(The external HDD used to be formatted for NTFS, but when I moved across to Apple last year, I reformatted to FAT32).
I haven't accessed the drive for a few months but the last time I did, it worked fine.
I'm running OS X 10.9.5 on MBA bought last year.
I've spent 2 hours trawling through blogs/mac forums/apple support and nearly bought Disk Warrior out of frustration, but surely there must be a simpler solution?
I don't think I'm dealing with a corrupt drive, just an inaccessible one!
Any help greatly appreciated, even if it is to pay the $$$ for DW...!
Thanks, Jay

See mount section in 1st link.
Disk Unmount Using Terminal
Disk Utility – Force Mount Disk

Does hp dc7900 support booting from 3tb hdd?

does hp dc7900 minitower support booting from 3tb hdd?

Hi:
Probably not.
In order to be able to boot from a 3 TB HDD, you need:
1. A UEFI BIOS, which I do not believe the dc7900 has.
There is a picture (see page 5 at the link below) of the HP splash screen for an HP business desktop that has a UEFI BIOS. If your HP splash screen doesn't look like the one in the picture, then you will not be able to boot from a 3 TB HDD.
2. A GPT-formatted hard drive.
http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c02826744/c02826744.pdf
Paul

Seagate 3TB HDD

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