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An excellent post by Aussie Storage Blog on the differences between SATA and SAS.

Aussie Storage Blog

Here are two common statement I often hear from clients:

  1. I don’t just want SAS drives, I also want SATA drives.  SATA drives are cheaper than SAS drives.
  2. Nearline SAS drives are just SATA drives with some sort of converter on them.

So is this right?  Is this the actual situation?

First up, if your storage uses a SAS based controller with a SAS backplane, then normally you can plug SAS drives into that enclosure, or you can plug SATA drives into that enclosure.    This is great because when you plug SATA drives into a SAS backplane, you can actually send SCSI commands to the drive plus you can send native SATA commands t00 (which is  handy when you are writing software for RAID array drivers).

But (and this is a big but) what we do know is that equivalent (size and RPM) SAS drives perform better than SATA drives…

View original post 725 more words

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About ausstorageguy

I am a IT Enterprise Storage Specialist based in Australia, with multi-vendor training and a knack for getting to the truth behind storage. I specialise in and have previously worked for EMC, however; I am also highly skilled and trained in: -NetApp FAS -NetApp E-Series (Formally LSI Enginio) -Dell Compellent and Equalogic -Hitachi USP, VSP and AMS -HP EVA, Lefthand, 3Par (and HDS OEMs) -LSI Engenio OEMs (IBM DS and Sun StorageTek) -TMS RamSAN -IBM XIV As you can imagine, that's alot of training... Thankfully; as a speciallist in storage, I don't have to think about much else. I try (Very hard) to leave any personal/professional attachment to any given product at the door and I have a zero tollerance for FUD. (Fear Uncertainty Doubt) So I beg all vendors commentators to leave the FUD, check the facts and let's just be real about storage. There may be some competetive analysis done on this blog, but I assure you, I will have check, re-check and checked again the information I present. However, should I get it wrong - which, above all else is a much greater tallent - I will correct it as quickly as possible.

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