> -----Original Message-----
> From: centos-bounces@xxxxxxxxxx
> [mailto:centos-bounces@xxxxxxxxxx] On Behalf Of Scott Ehrlich
> Sent: Monday, August 20, 2007 4:24 PM
> To: centos@xxxxxxxxxx
> Subject: RAID storage - SATA, SCSI, or Fibre Channel?
>
> I have a Dell PowerEdge 2950 and am looking to add more
> storage. I know a lot
> of factors can go into the type of answer given, but for
> present and future
> technology planning, should I look for a rack of SATA, SCSI,
> or fibre channel
> drives? Maybe I'm dating myself with fibre channel, and
> possibly SCSI?
>
> I may be looking to add a few TB now, and possibly more later.
>
> What are people using these days? What throughput and
> reliability are you
> seeing? What accounts for the cost differences?
I have seen the future and it is SAS, or serially attached
storage not necessarily serially attached scsi as it can handle
a mixture of scsi and sata technologies.
Here we just invested in the MD3000s, which puts the RAID
technology in the disk enclosure and allows multiple initiators
to attach to and share the logical volumes created within with
full write-back caching and multi-path redundancy.
It's a little more pricey, but we tried it the other way and it
wasn't as reliable and besides we were able to re-use our MD1000s
as expansion enclosures on our MD3000s, nice.
Currently the MD3000 only supports serially attached scsi, but I
have been told that support for SATA is in the works, which will
be a bonus when we look to move our file services off NAS onto
SAS.
-Ross
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