file system overhead

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What is the filesystem overhead percentage supposed to be for FC4
systems?  I have 2 200GB disks attached to the system and I let FC4 do
its thing and claim all of the space for itself.  When I do a df(1) I
see that only 279 x 1024^3 bytes are available after overhead.  That
comes out to only 71% of the original disk space.  Over 128GB is being
lost.  Is there really supposed to be that much overhead used?

In contrast, on a BSD system under I see only about 5% overhead when
looking at df(1).  Thats more in line with what I'd expect for the 
space taken by inodes.

    $ fdisk -l

    Disk /dev/sda: 200.0 GB, 200049647616 bytes
    255 heads, 63 sectors/track, 24321 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes

       Device Boot      Start         End      Blocks   Id  System
    /dev/sda1   *           1          13      104391   83  Linux
    /dev/sda2              14       24321   195254010   8e  Linux LVM

    Disk /dev/sdb: 200.0 GB, 200049647616 bytes
    255 heads, 63 sectors/track, 24321 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes

       Device Boot      Start         End      Blocks   Id  System
    /dev/sdb1   *           1       24321   195358401   8e  Linux LVM

    $ df
    Filesystem           1K-blocks      Used Available Use% Mounted on
    /dev/mapper/VolGroup00-LogVol00
                         279074448 243021012  21648624  92% /
    /dev/sda1               101086     15086     80781  16% /boot
    /dev/shm               2024208         0   2024208   0% /dev/shm

-wolfgang
-- 
Wolfgang S. Rupprecht                http://www.wsrcc.com/wolfgang/
Direct SIP URL Dialing: http://www.wsrcc.com/wolfgang/phonedirectory.html


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