Error fsck

[David]

Hola listeros:

Tengo mi ubuntu 8.04 dividido en varias particiones unas son ext3 y lo home de tipo reiserfs.

Al arrancxar me ha dado el siguiente error:

Log of fsck -C3 -R -A -a 
Wed Feb 18 16:43:46 2009

fsck 1.40.8 (13-Mar-2008)
Filesystem seems to have fatal corruptions. Running with --rebuild-tree is required.
Reiserfs super block in block 16 on 0x825 of format 3.6 with standard journal
Blocks (total/free): 9389984/2411107 by 4096 bytes
Filesystem is clean
Replaying journal..
/dev/sdb1: clean, 567/25755648 files, 25262273/51482292 blocks
Reiserfs journal '/dev/sda3' in blocks [18..8211]: 0 transactions replayed
Checking internal tree..finished
Reiserfs super block in block 16 on 0x803 of format 3.6 with standard journal
Blocks (total/free): 263056/236851 by 4096 bytes
Filesystem is clean
Reiserfs super block in block 16 on 0x803 of format 3.6 with standard journal
Blocks (total/free): 263056/236851 by 4096 bytes
Filesystem is clean
fsck died with exit status 4

Wed Feb 18 16:43:52 2009
----------------

mi fstab es el sguiente

# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    defaults        0       0
# /dev/sda5
UUID=838a91b3-0754-405a-8005-2379df88d33a /               ext3    relatime,errors=remount-ro 0       1
# /dev/sda3
UUID=5274f0d4-cd21-4049-af0d-4103a41356a5 /boot           reiserfs notail,relatime 0       2
# /dev/sdc5
UUID=d8edb2ea-a4b2-400c-8295-c12318c62ca5 /home           reiserfs relatime        0       2
/dev/sdc2       none            swap    sw              0       0
/dev/scd0       /media/cdrom0   udf,iso9660 user,noauto,exec,utf8 0       0
/dev/scd1       /media/cdrom1   udf,iso9660 user,noauto,exec,utf8 0       0
/dev/fd0        /media/floppy0  auto    rw,user,noauto,exec,utf8 0       0

#Disco 250 
/dev/sdb1	/home/david/disco250 	ext3	relatime,errors=remount-ro	0	2

¿Que hago para arreglarlo?, ¿tengo peligro de perder mis datos?

Un saludo
   David