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Raid & Raid controller considerations ??

Discussion in 'Computers, Games, Electronics etc' started by CRX-YEM, Jan 20, 2006.

  1. CRX-YEM

    CRX-YEM Super Moderator Moderator VIP

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    so any help here. so far I think I'm either going 0+1 pro's i like that I can sustain multiple drive failures across differnet mirroed pairs, con's need more disk for larger disk space. Raid 5, I can use less disk for same drive space as raid 0+1 pros data can be regenerated etc...


    ok so what about the controller, I guess I should look for one that has a reserve drive avaliable incase of a failure.


    any input is appeciated
     
  2. Sabz5150

    Sabz5150 FALCON PUNCH!!!

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    If you are looking for a price-point answer to your problems, snag a PCI ATA133 RAID controller. They can handle up to four drives in a 0+1 format. For RAID 5, you will either need an ATA133 controller combined with software RAID (I trust Microsoft's software RAID 0%) or an Escalade RAID controller which supports up to 8 drives, either ATA133 or SATA. As with the vehicle, the controller card aint cheap.

    How much drive space are you looking to get and how many drives do you want to use?
     
  3. CRX-YEM

    CRX-YEM Super Moderator Moderator VIP

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    I was looking at getting 4 x 250 gb drive, I was looking into the PROMISE FastTrak TX4000 PCI IDE Controller Card RAID 0/1/10 JBOD =$110

    since it's only 4 drive I was just going to house them in a computer case.
     
  4. Sabz5150

    Sabz5150 FALCON PUNCH!!!

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    So you want 500GB of 0+1? Or 750GB of 5?

    Personally I would opt for RAID 5. More drive space and you can lose one drive and still function.
     
  5. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Eek. I would recommend something that has its own processor and memory on board- like a TRUE RAID controller. Not these cheapo jobs that rely on some software driver to perform the RAID functions and only support 0, 1, or 1/0. Most of those are just cheap IDE controller cards with very basic RAID capability.

    You might want to look into a BusLogic, Adaptec or LSI Logic card- there are other major name brands out there too (3Ware etc), but those are 3 of the big ones that offer true RAID cards, good reliability and can be had for not too much cash. Go with SATA if you can- that way you have the capability of talking to all device at the same time. If you get a 2 channel (4 device) IDE RAID card, you can still only talk to 1 device per chain at a time. That's just how IDE works- only one device on a cable can be active at a time. SATA is the same, but you only have one device per cable, so it's not an issue. SCSI can talk to ALL devices at once, but you probably don't want to drop the cash on a serious SCSI RAID.

    SATA isn't really any more expensive than parallel IDE these days, so it's worth the investment. I would recommend going with RAID 5 and a true RAID controller. With level 5, you already have your spare. I wouldn't bother with a reserve on top of that, unless you're really worried about losing 2 drives at the same time.
     
  6. nfn15037

    nfn15037 Senior Member

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    My .02: I run an Adaptec SATA with RAID 5, same 4x250GB setup you are thinking about and it has worked flawlessly since day 0. No problems at all, not even a hiccup. HDDs are so reliable these days, I wouldn't be afraid to run RAID 0 on a non-server application.
     
  7. CRX-YEM

    CRX-YEM Super Moderator Moderator VIP

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    but with raid 10 I could actually lose 2 drives and still function. I'll have to think about it more. and I think I'm going 4x300Gb now.
     
  8. Sabz5150

    Sabz5150 FALCON PUNCH!!!

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    :withstupid:
     
  9. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Play the odds though. What are the chances of you losing two drives within 1 week of each other? With RAID, you're not supposed to just run it like normal after losing a drive- when one fails, you replace it. It's very unlikely that you're going to kill 2 drives at once, even if they're made in the same batch at the same factory. When one dies, just order another one. Newegg will have it to you within 3-4 days. Regardless, you'll still have WAY better fault protection than you would with a non-parity system.

    Run the RAID 5.

    :thumbsup:
     
  10. pissedoffsol

    pissedoffsol RETIRED

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  11. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Nothing new... I'd still run RAID 5 in the home system.
     
  12. CRX-YEM

    CRX-YEM Super Moderator Moderator VIP

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    this is going to be for work
    I found an adaptec card that's got a processor and ram on board, ~$200
    and the 5x 300gb are like $125 each . not to bad really.
     
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