Feature suggestion: SCSI UNMAP / WRITE SAME

[mailinglists35]

On Linux initiator I can do lsblk -D and see that the iscsi block device supports discards, via SCSI UNMAP command.

It would be very useful to be able to support this (similar to how "TRIM supported: yes" appears for local SSD block devices)

[nsinenian]

Will explore this once DriverKit updates/changes are released. Note, however, that some of these features may be limited by DriverKit. The iSCSIInitiator does not implement a full SCSI stack. It translates between SCSI and iSCSI PDUs (along with session and connection management). In other words, if I can activate support for a particular command in the virtual driver it's because DriverKit allows for it; not because it is something that is (or is not) implemented in the SCSI stack.