On 3/25/23 02:05, Bart Van Assche wrote: > On 3/23/23 01:27, Christoph Hellwig wrote: >> On Mon, Mar 20, 2023 at 10:22:41AM -0700, Bart Van Assche wrote: >>> * T10 has not yet started with standardizing a zone append operation. >> >> Time to get it started then! > > Hi Christoph, > > If someone else wants to work on this that would be great. I do not plan > to work on this because I do not expect that a SCSI zone append command > would be standardized by the time we need it. Although there are > references to T10 drafts in the UFS standard, since a few months JEDEC > strongly prefers to refer to finalized external standards in its own > standards. Hence, standardizing zoned storage for UFS would have to wait > until T10 has published a standard that supports a zone append command. > INCITS published ZBC-1 in 2016, two years after the first ZBC-1 draft > was uploaded to the T10 servers. INCITS approved ZBC-2 this month, six > years after the first ZBC-2 draft was uploaded to the T10 servers. > Because of the long time it takes to complete new versions of T10 > standards we plan not to wait until T10 has standardized a zone append > operation. Such standardization effort is likely to face a lot of headwind because defining a zone append command for ATA (T13 ACS) is not possible with a single self-contained command (as one cannot return the written sector using sense data like with scsi). And when it comes to ZBC, keeping it in sync with ZAC is desired... -- Damien Le Moal Western Digital Research
