On 08/04/2010 12:37 PM, Avi Kivity wrote:
On 08/04/2010 08:27 PM, Anthony Liguori wrote:
On 08/04/2010 12:19 PM, Avi Kivity wrote:
On 08/04/2010 08:01 PM, Paolo Bonzini wrote:
That's another story and I totally agree here, but not reusing
/dev/sd* is not intrinsic in the design of virtio-blk (and one
thing that Windows gets right; everything is SCSI, period).
I don't really get why everything must be SCSI. Everything must
support read, write, a few other commands, and a large set of
optional commands. But why map them all to SCSI? What's the magic?
Because that's what real hardware with only a few rare exceptions.
I thought that IDE was emulated as SCSI even when it wasn't. But I
guess now with SATA you're right.
IDE -> EIDE -> ATA -> SATA
ATA can encapsulate SCSI commands via ATAPI which gives you the ability
to have ATA based CD-ROMs among other things.
I don't believe that SATA actually uses SCSI commands for read/write
operations but I think Linux exposes SATA drivers as SCSI anyway.
Regards,
Anthony Liguori
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