Anyone use external drive for boot?

Discussion in 'iMac' started by Chupa Chupa, May 3, 2011.

  1. Chupa Chupa macrumors G5

    Chupa Chupa

    Joined:
    Jul 16, 2002
    #1
    Just wondering if there is a speed penalty if I used a FW800 enclosure. I'd prefer to use only ext. drives b/c the internal is so tricky to replace.
     
  2. discounteggroll macrumors 6502

    discounteggroll

    Joined:
    Aug 6, 2006
    Location:
    Greenwich, CT
    #2
    I've setup external HD's on iMacs where the logic board sata connection got fried. FW800 will definitely be usable, but not as pure as straight SATA. I am not sure if your imac has SATA2 interface, but let's use that as an estimate. FW800 has a transfer speed of ~100 MB/sec. SATA2 has a transfer speed of 300 MB/Sec.
     
  3. rnb2 macrumors regular

    Joined:
    Jan 23, 2006
    Location:
    West Haven, CT, USA
    #3
    Are you really contemplating not using the internal drive at all? That doesn't make sense - you're throwing away performance just in case it fails. Better to buy a FW800 external (or Thunderbolt external when available), use Super Duper to clone the internal to the external on a regular basis (like daily), and switch to the external IF the internal fails.

    I boot my 2009 i7 iMac from a FW800 SSD, and it works great, but I would not recommend running any machine from a platter-based hard drive over FW800 unless the internal has failed.
     
  4. hashilli macrumors member

    Joined:
    Feb 13, 2007
    #4
    I use to run two or three different installs, two on externals over FW. They were really, really old backup, but convenient when I needed to access old files or a particular *AMP stack for development, etc. Heck, I've worked for weeks on an external.
     

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