Hardrive capacity after formatting?

Discussion in 'Macintosh Computers' started by Bmode, Jan 6, 2004.

  1. Bmode macrumors regular

    Joined:
    Jan 2, 2004
    Location:
    California, USA
    #1
    Why does a 120GB HD only have a 111GB capacity after formatting. My format for this Western Digital internal drive ATA-100 is Mac OS extended, so what's the other 9GB's doing? Also, does indexing really help and how often should I do it?
     
  2. Nik_Doof macrumors regular

    Joined:
    Sep 15, 2003
    Location:
    St Helens, UK
    #2
    Simple dynamics of HDDs, you've gotta think overheads and advertising blunders :)

    Advertised as 120gig, when 1 gig = 1000, actually 1 gig = 1024, so theres a loss there. Also filesystems have overheads for allocation tables, cluster information, and journals (HFS+).

    I think thats how it goes, correct me if im wrong.
     
  3. edesignuk Moderator emeritus

    edesignuk

    Joined:
    Mar 25, 2002
    Location:
    London, England
    #3
    Yup, that's how it goes. I have a 120GB SATA drive, I get 114GB usable, and I just got a 200GB SATA, of which only 189GB is usable :( oh well...
     
  4. sonofslim macrumors 6502a

    sonofslim

    Joined:
    Jun 6, 2003
    #4
    yep, i've got two 120gb drives myself and they both hold 111 gigs.
     
  5. Bmode thread starter macrumors regular

    Joined:
    Jan 2, 2004
    Location:
    California, USA
    #5
    Thanks for the info, I thought it was something like that. Cheers.
     

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