You can use the vxfenclearpre utility to remove SCSI-3 registrations and reservations on the disks.
If you encountered a split brain condition, use the vxfenclearpre utility to remove SCSI-3 registrations and reservations on the coordinator disks as well as on the data disks in all shared disk groups.
You can also use this procedure to remove the registration and reservation keys created by another node from a disk.
To clear keys after split brain
Do you still want to continue: [y/n] (default : n)
Informational messages resembling the following may appear on the console of one of the nodes in the cluster when a node is ejected from a disk/LUN:
<date> <system name> scsi: WARNING: /sbus@3,0/lpfs@0,0/sd@0,1(sd91): <date> <system name> Error for Command: <undecoded cmd 0x5f> Error Level: Informational <date> <system name> scsi: Requested Block: 0 Error Block 0 <date> <system name> scsi: Vendor: <vendor> Serial Number: 0400759B006E <date> <system name> scsi: Sense Key: Unit Attention <date> <system name> scsi: ASC: 0x2a (<vendor unique code 0x2a>), ASCQ: 0x4, FRU: 0x0
These informational messages may be ignored.
Cleaning up the coordinator disks...
Cleaning up the data disks for all shared disk groups...
Successfully removed SCSI-3 persistent registration and reservations from the coordinator disks as well as the shared data disks.
Reboot the server to proceed with normal cluster startup...