Shared Memory

[Peter L. Peres]

On Mon, 31 Jan 2005, Lennart Sorensen wrote:

> On Fri, Jan 28, 2005 at 05:34:28PM -0500, Martin Duclos wrote:
>> I think one important consideration with the SATA drives is the fact that
>> even tho the bus speed is higher, the total throughput of the drive remains
>> the same as an ATA drive. Unless there has been big changes in drive seek
>> times and such, I don't there there any advantage throughput wise in
>> getting SATA.
>
> When they get native command queueing (NCQ) added in it will start to
> make a difference.  Command queueing used to be a SCSI only feature but
> real SATA drives have it too.  Most SATA drives so far have been IDE
> drives with a SATA interface added, not true SATA drives.  A few new
> drives are true SATA though and support the full spec.

I thought ncq was beneficial on scsi because several devices share the 
bus. On sata there is only one per bus. How would they benefit from ncq 
?

Peter
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