Want RAID Array

Discussion in 'Mac Accessories' started by Mufasa804, Sep 25, 2013.

  1. Mufasa804 macrumors regular

    Joined:
    Mar 6, 2009
    #1
    Greetings!

    I've been having trouble finding a good solution so I figured I would ask the public for their advice.

    I have two SATA3 (6 Gbit/s) drives that I want to RAID. I own a 2012 MacBook Pro and a 2009 24" iMac. In the future I plan on buying a Mac Mini that would primarily it plugged into.

    Anyways, I've looked at the following:

    OWC Mercury Elite + Thunderbolt Bundle

    NewerTech Guardian

    The benefit of the Mercury + Thunderbolt bundle is that it supports the newer SATA 3 drives and can take advantage of the 6Gbit/s, but then I'm only limited to using this array with my MacBook Pro, and my iMac would be out of luck.

    So I looked for something that would have USB 3.0 (Speeds close to Thunderbolt) and FW800 for iMac hookup. The NewerTech Guardian meets those specs but it uses SATA 2 controllers so my drives would be limited to the 3Gbit/s.

    Would I notice the difference if I'm mainly going to be using it to transfer and store movies? Playback would be done off the external. I would also be doing some editing off the external but not often.

    What other options out there am I missing?
     
  2. paulrbeers macrumors 68040

    Joined:
    Dec 17, 2009
    #2
    Most likely you won't notice a difference. SATA2 maxes out at 300MB/s. Mechanical hard drives at their absolute fastest (sequential large reads) do not even max out 200MB/s. Even two in RAID would only in some scenarios max out SATA2, but even then if only if you use "RAID0".
     
  3. Mufasa804 thread starter macrumors regular

    Joined:
    Mar 6, 2009
    #3
    That's what I was thinking, since I was mainly going to store important video files I was going to go with RAID 1. Thanks for your response!
     
  4. John Kotches macrumors 6502

    Joined:
    Jan 19, 2010
    Location:
    Troy, IL (STL Area)
    #4
    If you want to maximize space, and minimize risk, you might consider going RAID-5 and buying a replacement up front. This way, when a drive fails the replacement is almost immediate minimizing your exposure.

    Depending on how valuable the video data is, it might be a viable alternative to RAID-1 where your costs per GB of usable storage is 2x.

    Anyway, "important" is one of those words that can have multiple meanings, so I wouldn't rule out have a backup of the array depending on how critical your needs are.
     
  5. opinio macrumors 65816

    Joined:
    Mar 23, 2013
    #5
    I have both those enclosures and run the owc one on the LaCie t-bolt esata hub. They both run around 240MB/s read and write on either esata or USB 3.0 GMAX on RAID 0. Yes you can switch the GMAX to stripped instead of RAID 1 mirror.

    It's irrelevant about whether it is t-bolt, USB 3.0 or esata because the limiting factor is the drive speed. So unless you will run SSDs the read write speed is all the same. As I said I tested this and they are all the same.

    If you are going to run RAID 1 then then the same would apply.
    But...

    I now use Apple software RAID and get 260MB/s on the same drives on RAID 0.

    So I would suggest trying Apple raid in disk utility, but if you want an enclosure get the GMAX. It is a USB 3.0 and it has a better LED system for showing a failed drive in the mirror (one LED per drive, green good, red bad). The owc enclosure has one blue light. Owc said it should turn red is a drive is down but I am yet to experience that and it does not mention that in the manual.
     

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