Re: Large hard disk confusion

From: Marcus Lundblad (ml_at_Update.UU.SE)
Date: 02/06/05

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    Date: Sun, 6 Feb 2005 10:44:00 +0100 (CET)
To: Brian Clark <brian+devnull@unwell.org>

    On Sun, 6 Feb 2005, Brian Clark wrote:

    > I just installed sarge on a 160 GB hard disk. Partitions are 2GB swap,
    > 50 MB /boot, and the rest for /.
    >
    > ~$ df -ahT
    > Filesystem Type Size Used Avail Use% Mounted on
    > /dev/hda3 ext3 145G 230M 138G 1% /
    > proc proc 0 0 0 - /proc
    > devpts devpts 0 0 0 - /dev/pts
    > tmpfs tmpfs 443M 0 443M 0% /dev/shm
    > /dev/hda1 ext3 45M 9.3M 33M 23% /boot
    > usbfs usbfs 0 0 0 - /proc/bus/usb
    >
    > My question is, why is hda3 only showing as 145 GB? Surely ext3 isn't
    > taking up gigabytes worth of journal information?

    I think it's common that "160 GB" means 160000000000 bytes when
    manufactures defines harddrive space.
    And 160 "real" GB is 201997680640

    That's a significant difference.

    For example, I have a Maxtor 200 GB drive
    and this is what df -h shows:

    perseus$ df -h
    Filsystem Storlek Anvnt Tillg Anv% Monterat på
    /dev/hda1 897M 212M 637M 25% /
    tmpfs 507M 60K 507M 1% /dev/shm
    /dev/hda11 8,2G 4,0K 8,2G 1% /windows
    /dev/hda5 897M 627M 223M 74% /var
    /dev/hda6 897M 12M 838M 2% /tmp
    /dev/hda7 19G 5,0G 13G 29% /usr
    /dev/hda8 19G 941M 17G 6% /opt
    /dev/hda10 138G 110G 22G 84% /home
    lazyfs 100K 100K 0 100% /uri/0install
    /dev 897M 212M 637M 25% /.dev
    none 5,0M 752K 4,3M 15% /dev

    If you sum up theese, roghly it gets 188 GB...

    //Marcus 

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