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Feature suggestion: SCSI UNMAP / WRITE SAME #122

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mailinglists35 opened this issue Mar 15, 2021 · 1 comment
Open

Feature suggestion: SCSI UNMAP / WRITE SAME #122

mailinglists35 opened this issue Mar 15, 2021 · 1 comment

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@mailinglists35
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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)
@mailinglists35 mailinglists35 changed the title Feature suggestion: SCSI UNMAP Feature suggestion: SCSI UNMAP / WRITE SAME Mar 15, 2021
@nsinenian
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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.

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@mailinglists35 @nsinenian