[svlug] df reports incorrect space usage

[Andy]

Hi,

== myconfig ==
Running on a P4, 1.7GHz with 640MB SDRAM, with MDK9.1 and a customized
Kernel, with a KDE desktop. (Intel 845GLLY mobo with 40G HDD, Home PC)

[andy at ferrari andy]$ uname -a
Linux ferrari.ncs 2.4.21-0.13oracle817 #16 Thu Jan 1 00:08:48 IST 2004
i686 unknown unknown GNU/Linux
== myconfig ==

I am facing with this weird problem. df is reporting incorrect disk
space usage! Running du instead, reports correct space usage. I have
listed the outputs of both the commands in the mail.

I have 40 GB HDD with 4 ~10GB partitions. I have setup the linux part
on the last 10 GB, with 4 partitions namely /boot, /swp, /home and /root.

The incorrect sizes are w.r.t the *fat32* partitions. Disk space usage
for the ext3 partitions are correct.

My partition table is as follows,
[root at ferrari andy]# fdisk -l
Disk /dev/ide/host0/bus1/target0/lun0/disc: 40.0 GB, 40060919808 bytes
255 heads, 63 sectors/track, 4870 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot    Start       End    Blocks   Id  System
lun0/part1   *         1      1216   9767488+   c  Win95 FAT32 (LBA)
lun0/part2          1217      4870  29350755    f  Win95 Ext'd (LBA)
lun0/part5          1217      2432   9767488+   b  Win95 FAT32
lun0/part6          2433      3648   9767488+   b  Win95 FAT32
lun0/part7          3649      3660     96358+  83  Linux
lun0/part8          3661      3727    538146   82  Linux swap
lun0/part9          3728      4238   4104576   83  Linux
lun0/part10         4239      4870   5076508+  83  Linux

(Note: Formatted o/p, dev is -> dev/ide/host0/bus1/target0/lun0/partX)

Now,
[root at ferrari andy]# df
Filesystem           1M-blocks      Used Available Use% Mounted on
/dev/hdc9                 3946      3384       362  91% /
/dev/hdc7                   92        17        70  20% /boot
/dev/hdc10                4880      4495       386  93% /home
/dev/hdc1                 9530      9527         3 100% /mnt/win_c
/dev/hdc5                 9530      8981       550  95% /mnt/win_d
/dev/hdc6                 9530      9460        70 100% /mnt/win_e

And,
[root at ferrari andy]# du /mnt/win_c
...
7.6G    /mnt/win_c (Which is correct, but df reports only 3MB free!)

Earlier the df o/p for win_c used to be fine. I carried out some
maintenance on win_c freeing up diskspace in excess of 1.5 GB and
since then df o/p has been coming wrong

[root at ferrari andy]# du /mnt/win_d
...
8.8G    /mnt/win_d (Again wrong!)

This is new. Earlier I use to always get 100% *free* for df. I recently
deleted some win32 installables over 700 MB in sizes and this
information has changed since then.

[root at ferrari andy]# du /mnt/win_e
...
9.3G    /mnt/win_e (This is correct)

My fstab entries are as follows,
[root at ferrari andy]# cat /etc/fstab
/dev/hdc9 / ext3 defaults 1 1
/dev/hdc7 /boot ext3 defaults 1 2
none /dev/pts devpts mode=0620 0 0
/dev/hdc10 /home ext3 defaults 1 2
none /mnt/cdrom supermount
dev=/dev/scd0,fs=auto,ro,--,iocharset=iso8859-1,codepage=850,umask=0 0 0
none /mnt/floppy supermount
dev=/dev/fd0,fs=auto,--,iocharset=iso8859-1,sync,codepage=850,umask=0 0 0
/dev/hdc1 /mnt/win_c vfat iocharset=iso8859-1,codepage=850,umask=0 0 0
/dev/hdc5 /mnt/win_d vfat iocharset=iso8859-1,codepage=850,umask=0 0 0
/dev/hdc6 /mnt/win_e vfat iocharset=iso8859-1,codepage=850,umask=0 0 0
none /proc proc defaults 0 0
/dev/hdc8 swap swap defaults 0 0
/dev/sda1 /mnt/memory_card auto
user,iocharset=iso8859- 1,kudzu,codepage=850,noauto,umask=0,exec
  0 0

Any pointers to where I should be looking at will be really helpful.

Thanks