[7674] in linux-scsi channel archive
Re: what are SCA SCSI drives?
daemon@ATHENA.MIT.EDU (John Munoz)
Mon Dec 13 02:07:58 1999
Message-ID: <38549D8B.93CC1991@uswest.net>
Date: Mon, 13 Dec 1999 00:17:31 -0700
From: John Munoz <jmunoz1@uswest.net>
MIME-Version: 1.0
To: Otis Gospodnetic <otis@DOMINIS.com>
Cc: linux-scsi@vger.rutgers.edu
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Otis Gospodnetic wrote:
> Hello,
>
> Could anyone explain to me what exactly SCA SCSI hard drives are?
> FRom what I've found on the web so far it seems like SCA SCSI drives are
> hot-swappable drives, but is this even always true and whether there
> something more to it?
>
> I'm about to buy pieces for a server to be running Linux so I need to make
> sure that I understand what I'm buying :)
>
> Thanks,
>
1)SCA drives use 80 pin connector that includes power, easier to pulg and
unplug.
2) SCA drives are designed to allow the scsi id to be set on the sca
backplane, just plug a new drive in and it assumes the id of the old drive.
the little 80 pin to 68 pin adapters are not very good, you can only use 2-3
separate sca adapters per channel (In my experience). An integrated sca
backplane (available from IBM or CRU (search for dataport, then look for 2, 3,
or 4 port backplane)
you may get lucky on some of the aution sites, I bought 5 18 gig sca ultra
drives for about 210 apiece. take a look ar www.onsale.com or www.ebay.com
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