Follow the procedure to replace failing disk on VIO server:
On VIOS, as padmin user:
Get and record information which will be needed for later operations and recreation of devices and configurations:
$ lsdev -virtual
To get volume group name in which failed disk participate:
$ lspv
To get list of logical volumes on disk:
$ lspv -lv
To get info about logical volumes, e.g. size (number of LPs):
$ lsvg -lv$ lsvg
To get info about LVs, VTD names, vhost numbers and virtual clients:
$ lsmap -all
On client(s):
Identify affected disk(s)(LVs on bad disk on VIOS):
# lscfg -vl(for all virtual SCSI disks) hdisk1 U9117.MMA.999999-V2-C12-T1-L8200000000000000 Virtual SCSI Disk Drive
Take note of the following:
V# - LPAR ID (this should be the LPAR ID of the affected VIOS)
C# - slot number
L# - LUN ID
# lspv
The affected disk may be listed as removed or missing depending on the failure.
# lsvg -p rootvg
Remove the bad disk from the mirror:
# unmirrorvg rootvg# reducevg rootvg# rmdev -dl hdisk#
On VIOS:
Remove all VTDs and LVs that reside on the failed disk:
$ rmvdev -vtd-rmlv
or
$ rmdev -dev$ rmdev -dev
Check if all logical volumes are removed form bad disk:
$ lspv -lv
Remove the disk from the respective volume group:
$ reducevg
Note: If the volume group consists of only one disk then the whole VG
will need to be removed from ODM. In that case use the following
commands:
$ deactivatevg$ exportvg
Replace the failed disk:
$ diagmenu--> select “Task Selection”--> select “Hot Plug Task”--> select “SCSI and SCSI RAID Hot Plug Manager”--> Replace/Remove a Device Attached to an SCSI Hot Swap Enclosure
Configure the new disk:
$ cfgdev
Add the new disk to the volume group or recreate the VG in case it was removed:
$ extendvg
or
$ mkvg -vg
Recreate the LVs with the same names and size which we got in the beginning.
$ mklv -lv
Recreate the VTDs:
$ mkvdev -vdev-vadapter -dev
On client(s):
Discover new disk(s) and rebuid mirror:
# cfgmgr# extendvg rootvg# mirrorvg rootvg
Build boot image on both mirrored disks (just in case):
# bosboot -ad /dev/# bosboot -ad /dev/
Set bootlist:
# bootlist -m normal# bootlist -m normal -o
Bad disk in rootvg of VIO server
Usually rootvg utilize some kind of disk protection. Most often rootvg
consists of disks which are LVM mirrored. To replace a mirrored hdisk in
rootvg of VIO server you can use VIO commands or root AIX commands (to
become root, use oem_setup_env command). In this example we will use VIO commands since this is the recommended way of managing VIOS.
Break the mirror:
$ unmirrorios, where is the bad disk
Check if any LV remained on the bad disk:
$ lspv -lv
If there are any (e.g. lg_dumplv - dump device) migrate them to the
other disk or remove them (dump device can be recreated later):
$ migratepv -lv
or
$ rmlv -f
Take out failed disk from rootvg:
$ reducevg rootvg
Use ”Hot Plug” procedure to replace the failed disk:
$ diagmenu--> select “Task Selection”--> select “Hot Plug Task”--> select “SCSI and SCSI RAID Hot Plug Manager”--> Replace/Remove a Device Attached to an SCSI Hot Swap Enclosure
Configure the new disk:
$ cfgdev
Verify that the new disk came back with the same number as the previous one:
Check bootlist to ensure that both disks are included as boot devices:$ lspv$ extendvg rootvg
$ mirrorios -defer(Note that if you do not use -defer option, your VIO server will be rebooted after mirroring completes)
$ bootlist -mode normal -lsUse the command below to include both disks if they do not show up in the bootlist:
hdisk0 blv=hd5
hdisk1 blv=hd5
$ bootlist -mode normal hdisk0 hdisk1
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