Creating RAID 0

Here's the setup: two identical 40gb disks, one used as large storage the other used for the OS and 30gb stripe.
I'm having trouble getting the correct file size reported back when I use the df -k command. Instead of getting a 66 gb virtual drive, it only reports the first volume of 36gb. I know they are both attached. Here is what I have done.
1. I've created partitions and added the newfs to each of the partitions.
2. I have set up the metadb,
3. I have run the metainit and received the concat/stripe is set message. I've called it d23 as a drive.
4. I've edited the /etc/vfstab file to include the new drive.
It's just not showing up as a 66 gb hard drive.
If anyone can see a mistake or knows of a better way of doing this, let me know. I'm going bald with frustration...
ps. I've tried using Solstice Disk Suite 4.2.2 and SMC. No luck with them either.

You cannot use an existing drive as part of a RAID without it being erased. So you need to make a backup in order to do what you want. However, making a RAID from an SSD and an SD card will result in a very slow RAID. It is not a good idea. RAIDs should be created with similar if not identical drives for best performance. You would be better off replacing your SSD with a larger one if that is possible in your model. Or, just get an external hard drive, forget the RAID and the SD card.

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How can I create RAID 1 on Mac mini server just now from box.

I bought my Mac mini server two days ago and decided that 1Tb + 1Tb HDD are very good for RAID 1 (mirroring).
Thinking - doing ... Open Disk Utility, try to change and create RAID. Nothing. Try to reinstall OS X - recovery part are on disk all time.
Does anybody can help me to create what I want and how to do this with minimum energy. Thanks a lot.

Start from an Internet Recovery which boots you into it's own Recovery Partition. From there use Disk Utility to put your 2 drives into RAID 1. Reinstall OS X from the Internet Recovery once you have done that and install everything else as you need to.
Be aware that RAID volumes do not have their own Recovery Partition so you will need to either have an external drive with an RP to boot into else you will need to use Internet Recovery each time (which is around a 650MB download).

Unable to create RAID on SPARC-Enterprise-T5220

hi:
i got the following issue on my SPARC-Enterprise-T5220.
i have constructed the RAID-1 on 4 disks out of 6.
i have created RAID-1 on OS Disks using raidctl command on single user mode
and i have created RADI-1 on other two disks. but i'm unable to create RAID-1 on the rest of the two disks.
here i s the info i am giving
# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c1t0d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@0/pci@0/pci@2/scsi@0/sd@0,0
1. c1t1d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@0/pci@0/pci@2/scsi@0/sd@1,0
2. c1t2d0 <LSILOGIC-LogicalVolume-3000 cyl 65533 alt 2 hd 16 sec 273>
/pci@0/pci@0/pci@2/scsi@0/sd@2,0
3. c1t4d0 <LSILOGIC-LogicalVolume-3000 cyl 65533 alt 2 hd 16 sec 136>
/pci@0/pci@0/pci@2/scsi@0/sd@4,0
disks 2 and 3 are under raid but where as 0 and 1 are not
i am trying to construct raid on that disks it is giving following error
# raidctl -c c1t0d0 c1t1d0
Creating RAID volume will destroy all data on spare space of member disks, proceed (yes/no)? yes
Too many arrays.
here is my OS release information
Solaris 10 5/08 s10s_u5wos_10 SPARC
Copyright 2008 Sun Microsystems, Inc. All Rights Reserved.
Use is subject to license terms.
Assembled 24 March 2008
SunOS 5.10 Generic_127127-11 sun4v sparc SUNW,SPARC-Enterprise-T5220
would any body help me on this.
thanks in advance
SN

Hello sir,
I work for one of Sun's Channel Development Partners and had a partner site the same problem today, but with a T5240.
If you check with the "Disk Volumes" section of the T5120/T5220 Admin Guide, it tells us that the integrated LSI controller only supports up to two volumes at a time.
http://docs.sun.com/source/820-2179-10/Volume-man.html#50606103_28600
If you need more options for hardware RAID configuration of the internal disks, Sun offers an internal PCI-E SAS RAID HBA:
SGXPCIESAS-R-INT-Z
Sun StorageTek (TM) 8-port internal SAS RAID Host Bus Adapter with RAID 0, 1, 1E, 10, 5, 5EE, 50, 6, 60 support, 256MB of onboard memory and 72 hour Battery Backed Write Cache. RoHS 6. X-Option.
List Price: $599
You'd also want this cable kit to go with it:
SEDX9SA2Z
Internal SAS Cable Kit required to use Sun RAID Card SG(X)PCIESAS-R-INT-Z for use with the SPARC Enterprise T5220
List Price: $40
Here is documentation about the adapter:
http://docs.sun.com/app/docs/coll/sas-raid-hba-int

Need help in creating RAID 5

Hi everyone,
i'm fairly new to RAID scene and i need help for creating RAID 5 with 8 disk's.
I have HP ProLiant DL380 G6 with 8 disk's, each 500 GB.
i'm trying to create RAID 5 and to have one spare disk. I have made array from 7 disk and then create logical drive.
the last disk (8-th) i used as spare.
up to now i think i'm ok???
what confuse me is:
7 HDD X 500GB= 3500GB
after creating array i get 3200 GB, where i lose 300 GB??
after creating logical drive i get 2700 GB, where i lose 500 GB???
from 2700GB i give 150GB for system partition and for data storage i have only 2550 GB.
Why i lose 800GB??
Can someone explain me how RAID 5 works, do i create it correctly and why i lose so much space???
Is there other way to create RAID 5 without losing so much space?
Thanks you in advnce.

The first 'loss' you encounter (300MB) is due to megabyte counting/rounding. A 500GB disk contains about 500.000.000 bytes. This quite a bit less than if counted properly using binary. you loose about 24288000 bytes per disk this way!
http://en.wikipedia.org/wiki/Mibibyte |
http://en.wikipedia.org/wiki/Megabyte
the second loss is due to how raid works.in raid 5 data is written to multiple disks to improve reliability. the simplies t form uses 3 disks: a write will cause half of the data to be written to disk 1, half to disk 2 and the XOR of both datahalfs to disk
3. In this scenario you will loose 33% of storage space and you can loose up to one of 3 disks.
By adding more disks, data can be spread more and the ratio available/raw will increase, or you can write aditionnal crc data and increase resliency for failures.
http://en.wikipedia.org/wiki/RAID
To check the exact algoritmes using on you RAID adapter, I would recommend contacting the vendor (or checking their support site) From your numbres, I do not think you will be able to configure RAID 5 on the same disks and having more available
space for your data.
MCP/MCSA/MCTS/MCITP

How to create Raid 1 on Solaris 10 step by step by DVD Media?

Please help me figure out "How to create Raid 1 on Solaris 10 6/06 while installation?" The system is Sun Fire X2100
Thank you very much.

Please help me figure out "How to create Raid 1 on Solaris 10 6/06 while installation?" The system is Sun Fire X2100
Thank you very much.

After creating RAID 5 for hard disks, CIMC shows Modrate fault

Dear all,
There are two UCS servers which the model is C240 M3
When I created RAID 5 for hard disks, CIMC shows Modrate fault.
The warring message is
storage virtual drive 0 degraded: please check the storage controller, or reseat the storage drive ucs
anybody has idea for this case? Thank you!

Is it an solution? Thank you!
The warning message appears if you do not have a Battery BAckup Unit Instllated on the server. I just worked with Cisco TAC and following is the solution.:
1. Launch KVM Console of the server
2. Power Cycle the Server
3. When LSI RAID configuration window displays, press CTRL+H and start the RAID Configuration Utility.
4. Click on Virtual Drive. Example Virtual Drive 0.
5. Change Default Write Mode to "Write Through" and click "Change"
6. Press "Yes" to take the effect.
7. Exit from RAID Configuration Utility nad restart the server.
From:
https://supportforums.cisco.com/discussion/11842501/ucs-c220-m3-megaraid-9266-8i-cache-degraded

Error -9980 encountered updating or creating raid on disk disk0

Hi,
i'm repairing a mirrored raid on Mac OS 10.3
the syntax is supposed to be:
diskutil repairMirror disk2 3 disk1 disk0
(disk2 is the raid set, 3 is the slice number - AppleBootRAID of disk1, disk1 is the working drive in the raid set and disk0 is a new drive).
I run the command and this is what i get:
Note: Syncing data between mirror partitions can take a very long time.
Started repairing mirror.
Error -9980 encountered updating or creating raid on disk disk0
between the "Started repairing mirror." and the error it takes a few seconds.
I tried adding another drive to the mix but i get the same error.
Does anyone knows where i can lookup the error number and its meaning?
Has anybody ever encountered this problem?
Thanks.
Marco

Thank you Tony,
the link to apple's error codes I'm sure will help me at some point even if it doesn't report the specific error I'm having right now.
What i'm doing is not supposed to be very difficult, i have a mirrored raid drive that has reported a problem and after having removed the problematic disc i'm re-adding a second disk.
I have never had the need to perform this operation but it is described pretty well in different discussion group as well as in the diskutil man page.
Like you did, i found a few places in which this specific error code is reported but never with an explanation of its meaning or a solution.
Anyway, i think i'm going to build a fresh new raid and then rsync all the info from the orphaned raid into the new one.
Thank you.
Marco

M4000 lsi 1064 can not create raid

Got an M4000.
prtdiag shows LSI-1064 controller.
00 PCI 0 2, 50, 1000 5, 1, 0 okay --, 133 scsi-pci1000,50 LSI,1064
/pci@0,600000/pci@0/pci@8/pci@0/scsi@1
# raidctl -S
0 "LSI_1064"
0.0.0 GOOD
0.1.0 GOOD
# raidctl -c c0t0d0 c0t1d0
Creating RAID volume will destroy all data on spare space of member disks, proceed (yes/no)? yes
Operation not support with volume of this level.
also can not create raid 1 from OBP.
also raid 1 deffined on a T2000 (an LSI-1064E controller) machine is not recognized by the M4000.
[M4000/M5000 Servers Product Notes|http://dlc.sun.com/pdf/820-7235-10/820-7235-10.pdf] says nothing about it except for a bug (6723202) regarding the M3000 machine.
Any Idea ?

There is no official document available which says why H/w RAID functionality is not there on Mx000 class machines.
None of the Mx000 offical document talks about the RAID functionality on these platfomrs which probably means that Sun is not supporting H/W RAID on these platform.
If you have any of these machines (Mx000 class) under a valid sun contract, you can open a ticket with Sun and verify this.

I use PATA HD create RAID 1 on 6728,but Win2K cannot find HD,WHY??

I use 2 PATA HD,want to create RAID on 6728,but Win2K cannot find the HD,WHY????

You must install Promise RAID Controller driver for Win2k then only you can see it.
Read this Moan Guide is very important.

Failed to created RAID in WAE-7371-K9

hi all
we have cisco wae-7371-k9 , we wanna recreate RAID device using cd recovery. we booting on cd, and when we done with option numbers 2,3,5 succes but when we came on option 7, we cannot recreate RAID, it failed, following the log:
Installer Main Menu:
    1. Configure Network
    2. Manufacture flash (done)
    3. Install flash cookie
    4. Install flash image from network
    5. Install flash image from cdrom
    6. Install flash image from disk
    7. Recreate RAID device (WAE-674/7341/7371 only)
    8. Wipe out disks and install .bin image
    9. Exit (Eject and reboot)
Choice [0]: 7
Recreate RAID device option is selected
All disk data will be lost.
Are you sure you want to recreate RAID array? [n]: y
Saving random seed...
dd: opening `/state/random-seed': No such file or directory
No volume groups found
Controllers found: 1
All data in logical drive 1 will be lost.
Deleting: logical drive 1 ("")
Command completed successfully.
Controllers found: 1
A selected physical drive is not available for use.
Command aborted.
Failed to create RAID Logical drive. (1,2)
   MODEL: OE7371
   FLASH: found, directory validated
COOKIE: valid
   IMAGE: 4.3.5.7
FLASHDEV: /dev/sda
what's wrong with wae ?if we run command show disk detail, all hard disk detected
NO-HOSTNAME# sh disk det
RAID Physical disk information:
disk00: Ready                      6SJ5Q4L8    286102 MB
disk01: Ready                      JTWSEBWL    286102 MB
disk02: Ready                      JTX0VYRL    286102 MB
disk03: Ready                      JTX1470L    286102 MB
disk04: Ready                      JTX1B9SL    286102 MB
disk05: Ready                      JTX1B24L    286102 MB
RAID Logical drive information:
Mounted file systems:
MOUNT POINT      TYPE       DEVICE                SIZE     INUSE      FREE USE%
Disk encryption feature is disabled.
can you help, what's the problem .?
is chassis or HDD error?

Budi,
Please turn off the unit, make sure you reseat the disks and then try the CD-recovery in the following way:
2,3, 5,8,7,8, remove the disk and 9
Please log the session then we can see how it went
Hope this helps!
Jorge

Failed to create RAID logical drive WAE-7371-k9

hi all we have cisco wae-7371-k9 , we wanna recreate RAID device using cd recovery. we booting on cd, and when we done with option numbers 2,3,5 succes but when we came on option 7, we cannot recreate RAID, it failed, following the log: Installer Main Menu: 1. Configure Network 2. Manufacture flash (done) 3. Install flash cookie 4. Install flash image from network 5. Install flash image from cdrom 6. Install flash image from disk 7. Recreate RAID device (WAE-674/7341/7371 only) 8. Wipe out disks and install .bin image 9. Exit (Eject and reboot) Choice [0]: 7 Recreate RAID device option is selected All disk data will be lost. Are you sure you want to recreate RAID array? [n]: y Saving random seed... dd: opening `/state/random-seed': No such file or directory No volume groups found Controllers found: 1 All data in logical drive 1 will be lost. Deleting: logical drive 1 ("") Command completed successfully. Controllers found: 1 A selected physical drive is not available for use. Command aborted. Failed to create RAID Logical drive. (1,2) MODEL: OE7371 FLASH: found, directory validated COOKIE: valid IMAGE: 4.3.5.7 FLASHDEV: /dev/sda what's wrong with wae ?if we run command show disk detail, all hard disk detected NO-HOSTNAME# sh disk det RAID Physical disk information: disk00: Ready JTX1470L 286102 MB disk01: Ready JTX1B24L 286102 MB disk02: Ready JTX1B9SL 286102 MB disk04: Ready JTWSEBWL 286102 MB disk05: Ready JTX0VYRL 286102 MB RAID Logical drive information: Mounted file systems: MOUNT POINT TYPE DEVICE SIZE INUSE FREE USE% Disk encryption feature is disabled. can you help, what's the problem .?

Budi,
Please turn off the unit, make sure you reseat the disks and then try the CD-recovery in the following way:
2,3, 5,8,7,8, remove the disk and 9
Please log the session then we can see how it went
Hope this helps!
Jorge

Mac Pro (2009) RAID Card - Can't create RAID Set

Hi Everyone,
I have a Mac Pro 4,1 (Model 2009) running Mavericks 10.9.2. with the Apple RAID Card installed. I got 4 new SAS Drives (Dell Toshiba MK2001TRKB) which I'm trying to configure into a single RAID5 set.
OS X detects the individual drives and with Disk Utility I can partition and/or format the individual drives. However when I try to create a RAID5 set using RAID Utility, the card won't create the RAID set. Ik keeps on showing the white-blue stripped progress bar. Tried creating a RAID0 or RAID1 with just 2 drives, but the card just doesn't create a RAID set.
Anyone got a clue why this isn't working?
Thanks,
Sander

Manualy erased all 4 the drives and it worked instantly. System is now initializing the volume :-)
Still a bit strange. All 4 the drivers where brand new. I did some further testing and if I select the partion tab and just create a new partition on each drive, it still doesn't work. I have to select the erase option in Disk Utility and just do a simple erase on each drive in order to be able to create the RAIDset.
Anyway, Thanks for the advise; performance even during initializing is pretty fast. I'm curious to see what kind of performance I get aftet the initialization is completed.

Creating RAID doesn't work using Disk Utility

When I try to create a RAID in Disk Utility, the pair gets corrupted and I get an error - "couldn't find RAID".
What is missing? Is there something else to install?
I'm trying this on an external USB drive.

I gave up.

Can't create raid array in 10.4.6

I am trying to create a mirrored raid array with two Fantom USB 2 external harddrives using disk utility.
I am unable to drag the image of any hard drive into the right window and the create button is never activated.
I have restarted, verified the disks and so on. I hve tried to select a different external disk but that won't work either.
Any ideas what's up.

You can try updating the drivers from the makers site, but it could be that Apple won't allow USB drives to RAIDed.
Unless your recording ET or something where a hard drive failure could mean disaster, mirrors are not ideal form of backup.
Consider auto-cloning and auto-backup software like DeJaVu or Retrospect.
What this will do is give you the benefit of time, cloning will "clone" a whole boot drive and make it bootable in case you need it. (You can clone a whole non-boot drive as well.) Auto-backup will copy user type files and folders, but it's not designed to copy a OS from one drive to another.
http://www.apple.com/downloads/macosx/systemdiskutilities/dejavu.html

Unable to create RAID - "could not unmount disk"

I'm trying to create a concatenated RAID set from two drives. I can select the drives and individually unmount them using Disk Utility, and they disappear from the desktop. But when I try and create a RAID using the two drives, it tells me it can't because it is unable to unmount the disk.
Any ideas?

It appears that this is possible - in one case. If your system drive has been partitioned into multiple volumes, a volume from that drive can be used as part of a RAID (along with a volume from another drive) if you did not boot from the drive. Haven't tried booting from the Tiger DVD, but may just for fun. Follow all the other advise in this and similar threads though - don't expect a mirror (RAID 1) to provide back up and don't build a RAID 0 stripe using the partition that contains your boot OS.

Adding 7 more drives to Raid and Creating Raid 50

We have 7 x 400 in a RAID 5 for 2.8TB in our XServe Raid. If we add anohter 7 and create another RAID 5 and then a RAID 50, will we lose all the data on the first 7 drives?
Will there be a large speed increase setting up a RAID 50 compared to two raid 5's?
Thanks!

Yes, and Yes.
Yes, you'll lose all the data (unless you back it up first). Creating any RAID 0 array wipes the existing data.
And Yes, you'll get a large speed increase. You'll be doubling your bandwidth to the array (using both fiber channel links rather than just one), and spreading the data across 14 drives instead of just 7 (so there's less latency waiting for the disk to spin to get the data under the read/write head).

Creating RAID 0

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