Description

This document attempts to explain the process required to remove a disk from a given diskgroup following thin reclamation activity. In this instance, even after reclaiming the space, the related disk still cannot be released from the corresponding diskgroup. 

The diskgroup name is named "dg01disk01", and the related disk is Veritas disk media (dm) name dg01disk01 linked to O/S native device name sdg


# vxdisk list | grep dg01disk01
sdg          auto:cdsdisk    dg01disk01   dg01         online thinrclm


When attempting to remove the disk from the diskgroup, the vxdg command fails with the following message:

# vxdg -g dg01 rmdisk dg01disk01
VxVM vxdg ERROR V-5-1-552 Disk dg01disk01 is used by one or more subdisks.
        Use -k to remove device assignment.

From the standard vxprint output, no Veritas Volume Manager (VxVM) objects are reported or associated with Veritas disk media (dm) name dg01disk01


# vxprint -g dg01 -qhr dg01disk01
dm dg01disk01   sdg          -        104758320 -       -        -       -


Even though the vxdisk reclaim process was completed without issues, the space has not been released. The vxdg free command implies the space is still allocated:


# vxdg -g dg01 free | grep dg01disk01
dg01disk01   sdg          sdg          62914560  41843760  -

 
The vxdefault command can be used to obtain the configurable Storage Foundation tunables.
 

# vxdefault list
KEYWORD                        CURRENT-VALUE   DEFAULT-VALUE
usefssmartmove                 thinonly        thinonly
fssmartmovethreshold           100             100
sharedminorstart               33000           33000
reclaim_on_delete_wait_period  1               1         <<<<<< currently set to "1"
reclaim_on_delete_start_time   22:10           22:10
usesmartmovewithvvr            on              on

 Process complete.