On Mon, Oct 02, 2023 at 08:28:04PM -0400, Martin K. Petersen wrote: > > Bart, > > > Neither the SCSI SBC standard nor the NVMe standard defines a "minimum > > atomic write unit". So why to introduce something in the Linux kernel > > that is not defined in common storage standards? > > >From SBC-5: > > "The ATOMIC TRANSFER LENGTH GRANULARITY field indicates the minimum > transfer length for an atomic write command." I would suggest that we don't try to claim any atomic write capability if this is not a logical block as such devices are completely useless. In fact I'd add a big warning to the kernel log if a device claims this, as this breaks all the implicit assumptions that a single logical block write is atomic.
