On 3/6/07, Russell Jones <[EMAIL PROTECTED]> wrote:
Russell Jones wrote:
> The way it works (if you're asking what I think you are)
You weren't: 3/10 for reading comprehension :-( I'll try again.
Had a look at the wikipedia, usually a good start for this sort of thing
http://en.wikipedia.org/wiki/SATA
Interestingly it seems SATA II is the name of a standards body, not a
standard http://www.sata-io.org/namingguidelines.asp
The following is very interesting, as it would seem to apply to all SAS
adapters, potentially:
> How does SAS compare to other serial technologies, like SATA?
>
> Serial Attached SCSI is an ideal I/O interface for server storage
> applications. *The SAS protocol supports SAS disk devices and also
> includes support for the Serial ATA II protocol [!] and command set*,
> offering customers the flexibility to directly connect both high
> performance SAS disk drives and high capacity low cost SATA disk
> drives to the same SAS controller. This added flexibility makes it
> easy for companies to standardize on a single I/O infrastructure for
> both mission critical storage and secondary storage dependent solely
> upon the disk drives installed. Customers can standardize on a single
> I/O controller or storage system for all of their storage
> configurations reducing training and repair costs.
>
>
http://www.adaptec.com/en-US/products/sas/raid/SAS-4805/_details/4800_4805_faqs.htm
So it sounds like the specifiers of SAS made SATA 3Gb/s a subset. If
that's so, I guess a SATA drive can be treated as a (less sophisticated)
SAS drive.
That is very interesting, so any compliant SAS controller will also be
able to talk SATA.
I assume the opposite is not true? ie. That a SAS disk can talk SATA?
It would actually make my job easier if I could use a SATA controller
to talk to a SAS drive, but that seems unlikely?
FYI: I do a lot of forensic imaging. Basically removing drives from
random computers, hooking them up to mine and doing a dd capture of
the full drive. Have not dealt with a SAS drive yet.
Greg
--
Greg Freemyer
The Norcross Group
Forensics for the 21st Century
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