REPAT/ SCSI UNMAP on an OVM SPARC or a Kernel Zone Configuration
Last updated on APRIL 27, 2018
Applies to:Solaris Operating System - Version 11.2 and later
Information in this document applies to any platform.
On : 11.2 version, Storage Target Drivers
REPAT/ SCSI UNMAP on an OVM SPARC configuration
Unmap is not functioning on OVM residing on Pure SSD storage:
If a file is deleted on a ZFS file system within an OVM guest,
the deletion is not translated into a SCSI UNMAP that is sent to the Storage array
and the storage array will not reclaim the space used by these deleted files.
Due to this issue space efficiency is not maximized
A host connected to an array supporting SCSI UNMAP should be able
to tell the Storage that unused space can be reclaimed.
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