If you experience a system failure, you can attach the storage to a different system and recover the complete configuration from the local disk set. For example, assume you have a system with an external disk pack of six disks in it and a Solaris Volume Manager configuration, including at least one state database replica, on some of those disks. If you have a system failure, you can physically move the disk pack to a new system and enable the new system to recognize the configuration. This procedure describes how to move the disks to another system and recover the configuration from a local disk set.
This recovery procedure works only with Solaris 9, and later, Solaris Volume Manager volumes.
Attach the disk or disks that contain the Solaris Volume Manager configuration to a system with no preexisting Solaris Volume Manager configuration.
Do a reconfiguration reboot to ensure that the system recognizes the newly added disks.
# reboot -- -r |
Determine the major/minor number for a slice containing a state database replica on the newly added disks.
Use ls -lL, and note the two numbers between the group name and the date. These numbers are the major/minor numbers for this slice.
# ls -Ll /dev/dsk/c1t9d0s7 brw-r----- 1 root sys 32, 71 Dec 5 10:05 /dev/dsk/c1t9d0s7 |
If necessary, determine the major name corresponding with the major number by looking up the major number in /etc/name_to_major.
# grep " 32" /etc/name_to_major sd 32 |
Update the /kernel/drv/md.conf file with the information that instructs Solaris Volume Manager where to find a valid state database replica on the new disks.
For example, in the line that begins with mddb_bootlist1, replace the sd with the major name you found in step 4. Replace 71 in the example with the minor number you identified in Step 3.
#pragma ident "@(#)md.conf 2.2 04/04/02 SMI" # # Copyright 2004 Sun Microsystems, Inc. All rights reserved. # Use is subject to license terms. # # The parameters nmd and md_nsets are obsolete. The values for these # parameters no longer have any meaning. name="md" parent="pseudo" nmd=128 md_nsets=4; # Begin MDD database info (do not edit) mddb_bootlist1=" |
Reboot to force Solaris Volume Manager to reload your configuration.
You will see messages similar to the following displayed on the console.
volume management starting. Dec 5 10:11:53 host1 metadevadm: Disk movement detected Dec 5 10:11:53 host1 metadevadm: Updating device names in Solaris Volume Manager The system is ready. |
Verify your configuration. Use the metadb command to verify the status of the state database replicas. and metastat command view the status for each volume.
# metadb flags first blk block count a m p luo 16 8192 /dev/dsk/c1t9d0s7 a luo 16 8192 /dev/dsk/c1t10d0s7 a luo 16 8192 /dev/dsk/c1t11d0s7 a luo 16 8192 /dev/dsk/c1t12d0s7 a luo 16 8192 /dev/dsk/c1t13d0s7 # metastat d12: RAID State: Okay Interlace: 32 blocks Size: 125685 blocks Original device: Size: 128576 blocks Device Start Block Dbase State Reloc Hot Spare c1t11d0s3 330 No Okay Yes c1t12d0s3 330 No Okay Yes c1t13d0s3 330 No Okay Yes d20: Soft Partition Device: d10 State: Okay Size: 8192 blocks Extent Start Block Block count 0 3592 8192 d21: Soft Partition Device: d10 State: Okay Size: 8192 blocks Extent Start Block Block count 0 11785 8192 d22: Soft Partition Device: d10 State: Okay Size: 8192 blocks Extent Start Block Block count 0 19978 8192 d10: Mirror Submirror 0: d0 State: Okay Submirror 1: d1 State: Okay Pass: 1 Read option: roundrobin (default) Write option: parallel (default) Size: 82593 blocks d0: Submirror of d10 State: Okay Size: 118503 blocks Stripe 0: (interlace: 32 blocks) Device Start Block Dbase State Reloc Hot Spare c1t9d0s0 0 No Okay Yes c1t10d0s0 3591 No Okay Yes d1: Submirror of d10 State: Okay Size: 82593 blocks Stripe 0: (interlace: 32 blocks) Device Start Block Dbase State Reloc Hot Spare c1t9d0s1 0 No Okay Yes c1t10d0s1 0 No Okay Yes Device Relocation Information: Device Reloc Device ID c1t9d0 Yes id1,sd@SSEAGATE_ST39103LCSUN9.0GLS3487980000U00907AZ c1t10d0 Yes id1,sd@SSEAGATE_ST39103LCSUN9.0GLS3397070000W0090A8Q c1t11d0 Yes id1,sd@SSEAGATE_ST39103LCSUN9.0GLS3449660000U00904NZ c1t12d0 Yes id1,sd@SSEAGATE_ST39103LCSUN9.0GLS32655400007010H04J c1t13d0 Yes id1,sd@SSEAGATE_ST39103LCSUN9.0GLS3461190000701001T0 # # metadb flags first blk block count a m p luo 16 8192 /dev/dsk/c1t9d0s7 a luo 16 8192 /dev/dsk/c1t10d0s7 a luo 16 8192 /dev/dsk/c1t11d0s7 a luo 16 8192 /dev/dsk/c1t12d0s7 a luo 16 8192 /dev/dsk/c1t13d0s7 # metastat d12: RAID State: Okay Interlace: 32 blocks Size: 125685 blocks Original device: Size: 128576 blocks Device Start Block Dbase State Reloc Hot Spare c1t11d0s3 330 No Okay Yes c1t12d0s3 330 No Okay Yes c1t13d0s3 330 No Okay Yes d20: Soft Partition Device: d10 State: Okay Size: 8192 blocks Extent Start Block Block count 0 3592 8192 d21: Soft Partition Device: d10 State: Okay Size: 8192 blocks Extent Start Block Block count 0 11785 8192 d22: Soft Partition Device: d10 State: Okay Size: 8192 blocks Extent Start Block Block count 0 19978 8192 d10: Mirror Submirror 0: d0 State: Okay Submirror 1: d1 State: Okay Pass: 1 Read option: roundrobin (default) Write option: parallel (default) Size: 82593 blocks d0: Submirror of d10 State: Okay Size: 118503 blocks Stripe 0: (interlace: 32 blocks) Device Start Block Dbase State Reloc Hot Spare c1t9d0s0 0 No Okay Yes c1t10d0s0 3591 No Okay Yes d1: Submirror of d10 State: Okay Size: 82593 blocks Stripe 0: (interlace: 32 blocks) Device Start Block Dbase State Reloc Hot Spare c1t9d0s1 0 No Okay Yes c1t10d0s1 0 No Okay Yes Device Relocation Information: Device Reloc Device ID c1t9d0 Yes id1,sd@SSEAGATE_ST39103LCSUN9.0GLS3487980000U00907AZ1 c1t10d0 Yes id1,sd@SSEAGATE_ST39103LCSUN9.0GLS3397070000W0090A8Q c1t11d0 Yes id1,sd@SSEAGATE_ST39103LCSUN9.0GLS3449660000U00904NZ c1t12d0 Yes id1,sd@SSEAGATE_ST39103LCSUN9.0GLS32655400007010H04J c1t13d0 Yes id1,sd@SSEAGATE_ST39103LCSUN9.0GLS3461190000701001T0 # metastat -p d12 -r c1t11d0s3 c1t12d0s3 c1t13d0s3 -k -i 32b d20 -p d10 -o 3592 -b 8192 d21 -p d10 -o 11785 -b 8192 d22 -p d10 -o 19978 -b 8192 d10 -m d0 d1 1 d0 1 2 c1t9d0s0 c1t10d0s0 -i 32b d1 1 2 c1t9d0s1 c1t10d0s1 -i 32b # |