[Gllug] Disk space anomaly

gunzip emacs.el at googlemail.com
Wed Jan 21 18:44:36 UTC 2009

'du' for  each directory under / shows:

bin  8.2Mb
boot  1.1Mb
dev 152k
etc 33.7Mb
home  89.1GB
initrd  8k
lib  139Mb
lib64  19Mb
lost+found  16k
media  16k
misc  8k
mnt  42.2GB
opt  8k
proc  4.7GB
root  40.7Mb
sbin  21.8Mb
selinux  8k
srv  8k
tftboot  100k
tmp  16k
usr  2.5GB
var  17.5GB

TOTAL = 156.26GB

This is made up of:

114.06GB + 42.2GB /mnt

However, 'df' shows:

Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda7            280030396 201440388  64365256  76% /
/dev/sda1               147764     16652    123483  12% /boot
none                   2022368         0   2022368   0% /dev/shm
//Backup/Projects    312057856  24420352 287637504   8% /mnt/Projects

.... ie. 200GB disk space used. Where did the other 44GB go?

I'm also unclear about /mnt/Projects. Do I uderstand that an external backup disk, mounted via smbfs, uses space on the local disk equivalent to the space used on the external disk?

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