After the reboot of a sun server, I found a diskgroup being unusable because of a wrong disk private region that was not consistent with the information stored in Veritas..
After having tried the classics
vxconfigd -k -x cleattempdir, I have found that Veritas is in fact doing some backup of the configuration of every diskgroup. This configuration could be easily restored online. Even more, this could be tested without any impact. Even better, if it doesn’t work: just rollback!
# vxdisk -o alldgs list DEVICE TYPE DISK GROUP STATUS EMC0_1 auto:sliced zonedg-dg01 (zonedg) online
This diskgroup wasn’t importable as the private region was not consistent. It consists of only one disk.
# /etc/vx/bin/vxconfigrestore -d zonedg
When this command is issued, you can then try to see if all you volumes are there and consistent (even fsck them). The cool thing is: nothing has been commited to the disk yet. If everything is clean and runs well, just commit the restore the the disk:
# /etc/vx/bin/vxconfigrestore -c