CVM requires the T10 vendor provided ID to be unique (3191807)

Last published : Sep 23, 2026
For CVM to work, each physical disk should generate a unique identifier (UDID). The generation is based on the T10 vendor provided ID on SCSI-3 vendor product descriptor (VPD) page 0x83. In some cases, the T10 vendor provided ID on SCSI-3 VPD page 0x83 is the same for multiple devices, which violates the SCSI standards. CVM configurations should avoid using such disks.
You can identify the T10 vendor provided ID using the following command:
\# sq_inq --page=0x83 /dev/diskname
On VxVM you can identify the T10 vendor provided ID using the following command:
\# /etc/vx/diag.d/vxscsiinq -e 1 -p 0x83 /dev/vx/rdmp/diskname
You can verify the VxVM generated UDID on the disk using the following command:
\# vxdisk list diskname | grep udid