-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Scott Ehrlich Sent: Monday, August 20, 2007 4:24 PM To: centos@centos.org Subject: [CentOS] 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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