SAS controllers and SATA tunneling
scottl at samsco.org
Mon Aug 15 14:31:36 GMT 2005
Andre Oppermann wrote:
> Scott Long wrote:
>> Andre Oppermann wrote:
>>> Does one of our SCSI-SAS controllers support multiplexors and
>>> SATA tunneling (STP)?
>> No. Adding a SAS module to the MPT driver is probably the easiest
>> option by far. SAS chips from Adaptec, Intel, Vitesse, and others
>> likely do not have a FreeBSD driver nor the available documentation to
>> write a FreeBSD driver.
> Oops, how does our future look then? Are we going to be restricted to
> SATA? I'd say in 2006 all new servers will be SAS-only. Old parallel
> SCSI is dead.
Like I said, the mpt driver will be fairly easy and straight forward to
add SAS and STP front ends. Their chips are also likely to be very
decent. It's up to Vitesse/Adaptec whether or not they want to be
relevant, though I guess that they won't care and it'll come down to
someone slogging through a linux driver (if one is even released) to
reverse engineer it. Intel is somewhat of an unknown quantity, though
my guess is that you'll see what amounts to a winmodem-like chip that
requires a huge complex driver.
Another option would be to do what I wanted to do last year with
extending the NDIS wrapper to cover Storport (and whatever the Longhorn
follow-on is) so that Windows drivers can be used.
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