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OS hallucinates hard drive geometry

Hi, I'm running woody with kernel 2.4.18.  (This is a custom kernel - I 
downloaded the source, and built it with make-kpkg.)  My hard drive is 
20 GB with three primary partions:

     Device Boot    Start       End    Blocks   Id  System
  /dev/hda1   *         1      1459  11719386   83  Linux
  /dev/hda2          1460      1945   3903795   83  Linux
  /dev/hda3          1946      2495   4417875   83  Linux

This means that hda1 is 11.7GB, hda2 is 3.9GB, and hda3 is 4.4 GB.
(hda1 has existed for a while: hda2 and hda3 are new partitions.) 
However, when I mount them, problems ensue:

(hda1 is already mounted on /)
  shiznit:~# mount /dev/hda2 /mnt/hda2
  shiznit:~# mount /dev/hda3 /mnt/hda3
  mount: you must specify the filesystem type
  shiznit:~# mount -t ext2 /dev/hda3 /mnt/hda3
  mount: wrong fs type, bad option, bad superblock on /dev/hda3,
       or too many mounted file systems
  shiznit:~# df -h
  Filesystem            Size  Used Avail Use% Mounted on
  /dev/hda1              11G  4.5G  6.0G  43% /
  /dev/hda2             926M   65M  814M   8% /mnt/hda2

Note that: 
1) /dev/hda2 is smaller than it should be. 
2) /dev/hda3 could not be mounted at all.

I tried the partitioning with fdisk, cfdisk, and parted (I decided not 
to try sfdisk yet).  Same results, except parted produced this warning:
  Information: The operating system thinks the geometry on /dev/hda is
  2495/255/63.  Therefore, cylinder 1024 ends at 8032.499M.

I'm not clear on what to try next.  Anyone?  Thanks in advance.


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