On Tue, Sep 20, 2022 at 08:17:10PM +1000, Daniil Lunev wrote: > to WRITE ZERO command in NVMe, but to WRITE UNAVAILABLE in There is no such thing as WRITE UNAVAILABLE in NVMe. > NVME 2.0 spec, and to UNMAP ANCHORED in SCSI spec. The SCSI anchored LBA state is quite complicated, and in addition to UNMAP you can also create it using WRITE SAME, which is at least partially useful, as it allows for sensible initialization pattern. For the purpose of Linux that woud be 0. That being siad you still haven't actually explained what problem you're even trying to solve.
