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Choosing SSD v SAS v SATA HDs? RRS feed

  • Question

  • Whats your decision process when choosing the hard drives to buy?

    Are these assumptions correct?

    SSD - fastest and most expensive.  Do these have a limit to how much data can be read/written to them?

    SAS - Mid range price, most common for high performance server systems.

    SATA - Slow but cheap. 

    Saturday, October 30, 2010 7:07 PM

Answers

  • HD vendors are looking to offer hybrid drives to perk up performance.

    SAS disks are not they useful anymore. SATA disks with their huge capacity have much better data transfer rates.

    SSD is best for a database server where access times ar critical.

    The cheap 2 TB disks are not bad, but there are faster versions for more $

     


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    • Marked as answer by Kevin Remde Monday, November 1, 2010 11:34 AM
    Sunday, October 31, 2010 6:59 PM

All replies

  • I know this is marked as answered, but hopefully you have this set to still alert you.

    SAS drives have not gone by the wayside yet. You can still get 15k rpm SAS for about the same price as 7200k or 10k SATA.

    It really comes down to the number of IOPs and space requirements you need. Spindle count is another thing to consider, as it will increase the number of IOPs your disk sets can handle.

    Here is a few links that go into this in more depth:

    http://www.vmdamentals.com/?p=296

    http://www.tek-tips.com/viewthread.cfm?qid=1592958&page=1

    http://www.sqlnewsgroups.net/sqlserver/t15267-raid-configuration-r10-r5-spindle-count.aspx


    Doug Phillips
    Thursday, November 4, 2010 7:48 PM
  •  Budget, access time, usage should lead your decision

    If you don't care about your budget or it is really critical for you to get a really fast HD go for SSD (by next year they will be cheap)

    If you are using application that are accessing your server all the time and you need speed go for SAS

    If you are using it normally go for SATA.

     

    Again, budget, Access Time, Usage in this order will be the key to your decision.

    Friday, November 5, 2010 9:19 PM