On Tue, 2013-09-24 at 11:37 +0200, Paolo Bonzini wrote: > Il 21/09/2013 00:03, Martin K. Petersen ha scritto: > > > > The major headache here of course is that WRITE SAME is inherently > > destructive. We can't just fire off one during discovery and see if it > > works. For WRITE you can issue a command with a transfer length of 0 to > > see if things work. But unfortunately for WRITE SAME a transfer length > > of zero means "wipe the entire device". Yikes! > > What about WRITE SAME with an out-of-range lba? Or lba equal to the > size of the disk and #blocks equal to zero. That's inviting undefined behaviour in a data destructive command ... not something we really want to do. James -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
