On Thu, Mar 30 2017 at 11:22am -0400, Martin K. Petersen <martin.petersen@xxxxxxxxxx> wrote: > Mike Snitzer <snitzer@xxxxxxxxxx> writes: > > > Would be very useful, particularly for testing, if > > drivers/scsi/scsi_debug.c were updated to support WRITE ZEROES. > > There is no WRITE ZEROES in SCSI. You should be able to get the right > behavior with lbpws=1 lbprz=1. OK, thanks.