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What are the merits of SAS vs SATA drives?

I am running a linux centos dedicated server. Basic specs are a Intel Dual Core Xeon X3065with 2GB ram and 2 x 160GB Sata drivers in RAID1 configuration. The server is used for host a php/mysql application.

I am in the process of upgrading, which will have a Quad Core Intel Xeon processor and 8 GB ram. One of the options is to upgrade to 2 x 300 GB SAS drives instead of 2 x 250 GB SATA drives. My understanding is that spindle speed on the SAS drives is 15k.

Is there any noticable speed difference from using SAS drives, and is reliability on a par with SATA?

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JonoB
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Yes there is, they run at much faster speeds, so your Random Access is a lot better, also they write/read considerably faster. Reliability is about the same if they are Enterprise grade SATA disks. (or thats what the manufacturers say).

I'd refer you for more info to this page.

Lucas Kauffman
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