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[Discuss] SAS drives

On Thu, 4 Aug 2011, Edward Ned Harvey wrote:

>> From: at [mailto:discuss-
>> at] On Behalf Of Edward Ned Harvey
>> I suppose I'll have to look again.  Perhaps it was as simple as this:
> I just looked closely at this again today, and I am happy to say my faith in
> humanity is restored.  ;-)  This is totally benign.  The world is good.
> hehehhe
> You cannot plug a SAS drive into a backplane that only supports SATA.
> That's the only restriction.  No problem.

I don't know why you say this. Once you have purchased the special SAS 
cable, one end plugs into the special SAS socket. But the other end plugs 
into either a SAS or SATA socket on a controller (because SAS controllers 
have to support both), even though the drive will only work with a SAS 
controller. So the special socket has merely moved the mismatch problem 
one cable closer to the controller.

Oh, I see it about backplanes that don't use a cable. So they solve the 
problem for a small segment of the market - the segment that has the 
skills to do the right thing anyway.

Daniel Feenberg

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