I have installed SL 5.1 many times!  The file system can be corrupted 
easily!  I don't know whether it is RedHat Linux's weakness.  Here are 
my experiences:
Case 1.
The system might stop here at boot time:
RedHat Nash 5.1.19.......

After rebooting, it might boot normally or the system went corrupted and 
no more boot again!


Case 2.
I installed 2 SATA harddisks as mirror pair on a SiI SATA software RAID 
card.  Installation is successful but after several days' operation, the 
system could not read the RAID pair.  Formatting was needed.


Case 3.
After several days' downloading of a movie file through Ktorrent, the 
file system went corrupted again!  Formatting harddisk required.

I heard that downloading BT file hurts hard disk very much.  However, 
Case 1 and Case 2 do not have any relationship with BT task.

Any technique or trick to avoid this?