Typically the "No valid disks found contian disk group" error is presented when one or more of the disks that were originally part of the disk group are not found. The "no valid disks" part of the error is kind of a misnomer.
You can do the following to investigate/confirm this:
List of visible disks reporting disk group membership:
# vxdisk -o alldgs list | grep <diskgroup_name>
Count of those disks:
# vxdisk -o alldgs list | grep <diskgroup_name> | wc -l
EG:
# vxdisk -o alldgs list | grep testdg
Disk_6 auto:cdsdisk - (testdg) online
Disk_7 auto:cdsdisk - (testdg) online
Disk_8 auto:cdsdisk - (testdg) online
# vxdisk -o alldgs list | grep testdg | wc -l
3
Next you need to determine how many disks the disk group configuration says should be present. To do this you need to identify a disk in the disk group with a configuration copy on it. Start looking at the "vxdisk list <device>" output for those disks until you identify the following:
Defined regions:
config priv 000048-000239[000192]: copy=01 offset=000000 enabled
config priv 000256-051423[051168]: copy=01 offset=000192 enabled
log priv 051424-055519[004096]: copy=01 offset=000000 enabled
lockrgn priv 055520-055663[000144]: part=00 offset=000000
If the config lines say "enabled" then take a note of the "private" slice for that disk:
# vxdisk list Disk_6 | egrep "^private"
private: slice=3 offset=256 len=65536 disk_offset=0
Next check the following:
# /etc/vx/diag.d/vxprivutil dumpconfig /dev/vx/rdmp/<device>s# | egrep "^dm"
(List of disk records in the disk group)
# /etc/vx/diag.d/vxprivutil dumpconfig /dev/vx/rdmp/<device>s# | egrep "^dm" | wc -l
(Count of those disk records)
EG:
# /etc/vx/diag.d/vxprivutil dumpconfig /dev/vx/rdmp/Disk_6s3 | egrep "^dm"
dm disk01
dm disk02
dm disk03
dm disk04
# /etc/vx/diag.d/vxprivutil dumpconfig /dev/vx/rdmp/Disk_6s3 | egrep "^dm" | wc -l
4
Next compare the value from the vxprivutil command line count and the vxdisk -o alldgs list count. As you can see in the above example, the disk group is expecting to find 4 disks, but only 3 disks are attached to the system.
You can attempt to force disk group import as well:
# vxdg -f import <diskgroup>
Afterwards perform a "vxdisk list" and not any failed or missing device statements.
