300GB drive in USB enclosure only showing as 36.8GB

Discussion in 'Mac Basics and Help' started by rogersmj, May 30, 2008.

  1. rogersmj macrumors 68020

    rogersmj

    Joined:
    Sep 10, 2006
    Location:
    Indianapolis, IN
    #1
    I took a drive from my Linux server, a 300GB Seagate PATA (IDE), and stuck it in a Vantec USB 2.0 enclosure to use as a backup drive on my main machine. When I plugged it in, though, it only registers as 36.8GB -- even after I use Disk Utility to partition it. I previously had a 120GB drive in this enclosure and it worked fine; the enclosure supposedly supports up to 500GB drives. Anyone know what's going on?
     
  2. chriscl macrumors 6502

    chriscl

    Joined:
    Jan 4, 2008
    Location:
    Stuttgart, Germany
    #2
    Have you checked on the back of the hard disk to see i yo have any jumpers set?

    On *some* IDE disks, there is a jumper you can set to 'clip' the maximum partition size (something to do with legacy/older BIOS limits) and *I think* that limit was 30-some GB?

    Have a look at the drive, and if there are any jumpers fitted, take them off (you shouldn't need to jumper the drive in an enclosure?)

    Also - in "Disk Utility", when you see the unpartitioned drive, it should show as its full capacity before partitioning (which - of course - will be less than 300GB due to 'rounding down' where 1GB is 1000MB, not the stated 1024MB!)
     
  3. rogersmj thread starter macrumors 68020

    rogersmj

    Joined:
    Sep 10, 2006
    Location:
    Indianapolis, IN
    #3
    Ok, I officially get the prize for being the biggest idiot on the forums this week.

    With all these hard drives floating around from my server (six of them -- I'm doing some major reconfiguring), in my wine-induced haze last night I had grabbed the old 40GB Seagate that looked exactly like the 300GB (except for the little "40.0 Gbytes" on the label, of course) and installed it in the USB enclosure. I didn't notice until I opened it back up this morning to double-check the jumpers.

    What have we learned? Don't do computer work after 3 or 4 glasses of Cappola Diamond Pinot Noir. :D
     
  4. mreg376 macrumors 6502a

    Joined:
    Mar 23, 2008
    Location:
    Brooklyn, NY
    #4
    I disagree. It was an acceptable risk. :)
     

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