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Thread: RAID 5

  1. 28th November 2015, 09:53 AM #1
    WhiteD3
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    RAID 5

    All,

    Just starting a new project and the spec calls for a rack server configured as RAID 5.

    My understanding is that RAID 5 is no longer recommended. This requirement will no doubt be a copy/paste from an old spec.

    Our site servers run MS Server for the OS and an SQL DB that can grow to say 40 GBs.

    We would usually go with a SSD for the OS and two 1TB drives in RAID 1 for the DB.

    Thoughts, recommends, comments welcome.
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  2. 28th November 2015, 10:11 AM #2
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    AndyG
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    I think you are really want RAID 1 not 0 for redundancy as a minimum

    RAID 5 is still popular and my personal favourite, with the right card. I work on the theory of more platters, more heads, better performance and redundancy. You of course have to monitor your drives and make sure they are ok. HP has a proprietary version of RAID 5.
    I use RAID 5 with 1 spare drive in the server unused, just in case.
    If your after performance SAS rather than SATA
    MAybe put your O/S and Application on the SSD and data on the disk, (and a copy oof your application)

    https://en.wikipedia.org/wiki/RAID
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  3. 28th November 2015, 10:27 AM #3
    WhiteD3
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    Sorry for the typo. RAID 1
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  4. 28th November 2015, 08:03 PM #4
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    Bytemrk
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    As Andy points out, raid 5 generally gives you read write performance increases as well - especially over raid 1.

    All by key servers are set up in at least SAS raid 5 with a hotswap.

    A lot will come back to the budget you have and exactly what you are trying to achieve.
    Mark

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