Question on using dual HD's

Discussion in 'OT Technology' started by HalfPastGone, Jan 14, 2009.

  1. HalfPastGone

    HalfPastGone OT Supporter

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    i'm building my first computer set up.. this one

    http://www.techreport.com/articles.x/15941/6

    the only difference is i'm using a 650W PS and a slightly better processor

    they suggest using 2 HD's for mirroring, but i already have an external

    other than running the OS on one any everything else on the other, why should i use two?
     
  2. Limp_Brisket

    Limp_Brisket New Member

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    having a RAID 1 mirror is not the same thing as having an external backup.
     
  3. HalfPastGone

    HalfPastGone OT Supporter

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    that's kind of what i was getting at. with a RAID 1 mirror the content will be available right away if one HDs crashes?

    i don't even plan on doing this.. so if i have an external to back up my stuff, i'm guessing there is no point in getting another HD?
     
  4. Limp_Brisket

    Limp_Brisket New Member

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    or if you want to do a RAID 0

    if you don't want a RAID of any kind, then no, there's no reason.
     
  5. Kieffer87

    Kieffer87 Orly OT Supporter

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    Basically in RAID 1 anything written to 1 disk is written to the other disk at the same time. So it will always be up-to-date and yes if one crashes, you just remove the bad one and run off of the good drive until you get a replacement.

    If you already have an external drive, and you already do backups with that, and that solution works for you, then don't worry about getting another drive.
     
  6. deusexaethera

    deusexaethera OT Supporter

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    With RAID1 there is also the benefit of reading data 2x as fast, which you don't get using non-RAIDed disks.

    But no, RAID doesn't protect against anything besides hardware failure.
     
  7. nofriends

    nofriends OT Supporter

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    Incorrect. Raid 1 will offer no performance gains, only fault tolerance.

    Raid 0 is what you are thinking of, but in real world applications it isn't actually 2x as fast.
     
  8. Limp_Brisket

    Limp_Brisket New Member

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    no, deus is right... well except the 2x part, but it can be faster.

    http://en.wikipedia.org/wiki/Raid_1#RAID_1_performance
     
  9. dave5678

    dave5678 New Member

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    2nd confirmation to Deus... it is a slight gain but not 2x in my own tests at home... I keep it raid0 and just backup every now and then to an external.
     

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