How to Replace a Failed SVM Disk _ Solaris Commands

How To Replace A Failed SVM Disk | Solaris Commands

http://www.solariscommands.com/disk/how-to-replace-a-failed-svm-disk/[13/10/2013 12:21:50 a. m.]

How To Replace A Failed SVM Disk

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Before you replace (what you believe is) a failed Solaris Volume Manager (SVM) disk, you need to establish whether it has indeed failed or is still in the process of failing. Why is it important to determine if an SVM disk has failed? It could save you a little time replacing a failed SVM disk as opposed to a failing one.

Read How To Tell The Difference Between A Failed Disk And A Failing Disk to find out which one your disk is. If your disk hasn’t quite failed yet, this article will show you How To Replace A Failing SVM Disk.

Now that you have established that you do have a failed SVM disk, find out if the disk contains SVM metadatabase replicas and delete them. Assuming that the failed disk is c1t1d0.

# metadb | grep c1t1d0

W p l 16 8192 /dev/dsk/c1t1d0s7

W p l 8208 8192 /dev/dsk/c1t1d0s7

W p l 16400 8192 /dev/dsk/c1t1d0s7

#

# metadb -d c1t1d0s7

#

# metadb

flags first blk block count

a m p luo 16 8192 /dev/dsk/c1t0d0s7

a p luo 8208 8192 /dev/dsk/c1t0d0s7


#

Unconfigure the failed SVM disk

# cfgadm -al

Ap_Id Type Receptacle Occupant Condition

c0 scsi-bus connected configured unknown

c0::dsk/c0t0d0 CD-ROM connected configured unknown


c1::dsk/c1t0d0 disk connected configured unknown




c2 scsi-bus connected unconfigured unknown

c3 fc-fabric connected configured unknown

c3::5006016239a02018 disk connected configured unknown

c3::5006016b39a02018 disk connected configured unknown

c3::5006048452a70c17 disk connected configured unknown

c3::5006048c52a70c07 disk connected configured unknown



c4::5006016a39a02018 disk connected configured unknown



usb0/1 unknown empty unconfigured ok




#

# cfgadm -c unconfigure c1::dsk/c1t1d0

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cfgadm: Component system is busy, try again: failed to offline:

Resource Information

------------------ -------------------------

/dev/dsk/c1t1d0s2 Device being used by VxVM

#

Note: This host uses SVM to manage internal disks and Veritas Volume Manager (VxVM) to manage SAN attached disks. VxVM keeps track of the internal disks – even if it doesn’t actually manage them – and may not allow you to unconfigure them. To get around this restriction, you may need to forcibly unconfigure the failed SVM disk by specifying the -f parameter to cfgadm.

# cfgadm -f -c unconfigure c1::dsk/c1t1d0

#

# cfgadm -al






c1::dsk/c1t1d0 disk connected unconfigured unknown


















#

Verify that the failed SVM disk is marked “unconfigured” as above. Sun servers with hot-swappable disks will also have the disk’s blue “ready to remove” LED lit.

Pull the failed SVM disk out of the drive bay and insert the new disk. The following message will come up in /var/adm/messages.

Jul 20 14:46:09 eap52 rmclomv: [ID 978967 kern.error] DISK @ HDD1 has been inserted.

Configure the new disk.

# cfgadm -c configure c1::dsk/c1t1d0

#

# cfgadm -al


























#

Verify that the new disk has been configured as above.

Copy the volume table of contents (VTOC) from the other disk in the mirror set, c1t0d0, onto the new disk.

# prtvtoc /dev/rdsk/c1t0d0s2 | fmthard -s - /dev/rdsk/c1t1d0s2

fmthard: New volume table of contents now in place.

#

If prtvtoc returns with an error similar to this, “/dev/rdsk/c1t1d0s2: Cannot get disk geometry“, you will need to run format to label the disk.

# format

Searching for disks...done

c1t1d0: configured with capacity of 72.36GB

AVAILABLE DISK SELECTIONS:

0. c1t0d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>

/pci@1f,700000/scsi@2/sd@0,0


/pci@1f,700000/scsi@2/sd@1,0


/pci@1f,700000/scsi@2/sd@2,0


/pci@1f,700000/scsi@2/sd@3,0

Specify disk (enter its number): 1

selecting c1t1d0

[disk formatted]

Disk not labeled. Label it now? y

FORMAT MENU:

disk - select a disk

type - select (define) a disk type

partition - select (define) a partition table

current - describe the current disk

format - format and analyze the disk

repair - repair a defective sector

label - write label to the disk

analyze - surface analysis

defect - defect list management

backup - search for backup labels

verify - read and display labels

save - save new disk/partition definitions

inquiry - show vendor, product and revision

volname - set 8-character volume name

! - execute , then return

quit

format> q

#

Recreate the metadatabase replicas on the new disk.



# metadb -a -c 3 c1t1d0s7

#

# metadb

flags first blk block count

a m p luo 16 8192 /dev/dsk/c1t0d0s7



a u 16 8192 /dev/dsk/c1t1d0s7

a u 8208 8192 /dev/dsk/c1t1d0s7

a u 16400 8192 /dev/dsk/c1t1d0s7

#

Update the new disk’s device ID entry in SVM. This step may not be required but it’s a good idea to do it just in case.

# metadevadm -u c1t1d0

Updating Solaris Volume Manager device relocation information for c1t1d0

Old device reloc information:

id1,sd@THITACHI_HUS103073FL3800_V3X6MDDA

New device reloc information:

id1,sd@THITACHI_HUS103073FL3800_V3X6MDDA

#

Enable the submirrors on the replacement disk. Start with the swap partition as this won’t affect any data in case SVM runs into a problem. You may enable the submirrors in the new disk in parallel or in sequence. If the I/O load on the system is heavy then do it in sequence. Otherwise, enable the submirrors in parallel.

# metareplace -e d1 c1t1d0s1

d1: device c1t1d0s1 is enabled

solaris_1# metastat d1

d1: Mirror

Submirror 0: d11

State: Okay

Submirror 1: d21

State: Resyncing

Resync in progress: 0 % done

Pass: 1

Read option: roundrobin (default)

Write option: parallel (default)

Size: 10491456 blocks (5.0 GB)

d11: Submirror of d1

State: Okay


Stripe 0:

Device Start Block Dbase State Reloc Hot Spare

c1t0d0s1 0 No Okay Yes

d21: Submirror of d1

State: Resyncing


Stripe 0:

Device Start Block Dbase State Reloc Hot Spare

c1t1d0s1 0 No Resyncing Yes

Device Relocation Information:

Device Reloc Device ID

c1t0d0 Yes id1,sd@SFUJITSU_MAW3073NCSUN72G_000707B0KHT4____DAN0P720KHT4

c1t1d0 Yes id1,sd@THITACHI_HUS103073FL3800_V3X6MDDA

#



SVM will resync the submirrors as soon as they are enabled. This is done in the background and may take a fair amount of time depending on the size of the submirrors. Now is a good time to go for a cup of coffee. Don’t forget to check the progress of the resync when you return.

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12 comments - What do you think? Posted by Ariel Giron - 25 February 2011 at 3:59 pm

Categories: Disk Tags: disk replacement, failed svm disk, replace disk, solaris volume manager, svm

12 Responses to “How To Replace A Failed SVM Disk”

penchalaiah says: 31 July 2011 at 3:54 pmyes very interesting to learn these steps.our feedback is excellent.who’s having in L1 position this steps are very helpfull. Thank you……..

Reply

rocky says: 3 August 2011 at 2:21 amExcellent Explanation!

Reply

prince says: 4 December 2011 at 3:14 pmThanks Very good

Reply

Rama says: 23 December 2011 at 6:15 pmExcellent

Reply

Saroj says: 6 January 2012 at 3:23 amThis is the proper way to follow in replacing the SVM corrupted Disk. My Rating to this Awesome.

Reply

siva says: 19 March 2012 at 11:07 pmGood and Clear explanation.

Reply

Ewaz ali says: 2 April 2012 at 10:18 pmThis is one of the best guide I have ever found, this is very helpful. thank you very much!

Reply

Vishwa says: 4 May 2012 at 3:39 pmOsm !!! Really nice explanation . Kindly update the same steps for VXVM Disk Replacement.

Pls send the documents to this id : [email protected] So that i can learn lot…

Reply

Pramod says: 17 May 2012 at 6:56 amThis is very nice explanation.

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leyakath says: 17 May 2012 at 12:56 pmGood Explanation..with complete screen shots!

Thank you so much to posted this information

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sun says: 8 June 2012 at 3:23 amvery good explanation.

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Balkumar_UNIX says: 26 August 2012 at 11:31 pmVery nice…. Thnx

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How to Replace a Failed SVM Disk _ Solaris Commands

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