Using Veritas Dynamic Multi-Pathing (DMP), Storage Foundation Cluster File System High Availability automatically discovers thin devices that have been recognized on the host as thin
or thinrclm
. DMP uses the Veritas array support libraries (ASLs) to recognize vendor-specific thin attributes and claim devices accordingly as thin
or thinclm
.
Thin devices that are classified as thin
are capable of thin provisioning. Veritas Thin Reclamation only works on devices with the thinrclm
attribute set. Before performing thin reclamation, determine whether the system recognizes the LUN as a thinrclm
host.
To identify devices on a host that are known to have the thin
or thinrclm
attributes, use the vxdisk -o thin list command. The vxdisk -o thin list command also reports on the size of the disk, and the physical space that is allocated on the array.
To identify thin and thinrclm LUNs
thin
or thinrclm
LUNs that are known to a host, use the following command:# vxdisk -o thin list DEVICE SIZE(mb) PHYS_ALLOC(mb) GROUP TYPE hitachi_usp0_065a 10000 84 - thinrclm hitachi_usp0_065b 10000 110 - thinrclm hitachi_usp0_065c 10000 74 - thinrclm hitachi_usp0_065d 10000 50 - thinrclm . . . hitachi_usp0_0660 10000 672 thindg thinrclm emc_clariion0_48 30720 N/A - thin emc_clariion0_49 30720 N/A - thin emc_clariion0_50 30720 N/A - thin emc_clariion0_51 30720 N/A - thin
In the output, the SIZE column shows the size of the disk. The PHYS_ALLOC column shows the physical allocation on the array side. The TYPE indicates whether the array is thin or thinrclm.
See the vxdisk(1m) manual page.