On 08.03.2012 11:44, Gerd Hoffmann wrote: > On 03/07/12 20:58, Gerhard Wiesinger wrote: >> On Wed, 7 Mar 2012, Brian Jackson wrote: >>> I think most people trying to use qemu for anything useful have given >>> up on if=scsi. Some distros even disable support because they don't >>> want to QA it. That should be a decent sign that you may want to avoid >>> it. >> >> OK, but SAS (Serial attached SCSI) is technology in the area of storage >> interface technology where all big storage vendors see future (e.g. they >> give up: FC and SATA drives, SATA drives are replaced by MDL SATA drives >> (SATA 7200RPM drives with SAS interface)). > > The problem isn't scsi. The problem is the lsi adapter. Problem #1 is > the hardware design which makes it hard to emulate it correctly and #2 > that you need a non-redistributable rom file to boot from it.
#2 isn't an issue actually, at least for Debian users -- I just patched extbook back to allow booting from scsi and to let people some transition time to move from boot=on syntax which was supported before 1.0 and dropped suddenly without any warnings in 1.0, breaking people setup. I think I'll continue shipping extboot support at least as long as there's no native support for scsi booting in bios. /mjt >> Therefore I don't understand why distros are giving up SAS which is also >> SCSI (of course old legacy SCSI is understandable). > > Nobody gives up on scsi. See virtio-scsi merged recently. There also > is megasas aiming for merge (which shares the boot issue with lsi though). >
