'Some Contents Unreadable" error.Is my Hard drive corrupted?

[Rajev Mhasawade]

Hi,
I need help.Plz confirm me if im in a problem.Is my HDD corrupted?
I have Fedora 3.When i right click /usr (which is a separate
partition) it first calculates used space and then this comment below
it. "(some contents unreadable)".Same with /doc partition.
I did check my /doc partition using fcsk but i didnt understand the
output it gave.
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[root at localhost ~]# fsck /dev/hda12
fsck 1.35 (28-Feb-2004)
e2fsck 1.35 (28-Feb-2004)
/dev/hda12 is mounted.

WARNING!!!  Running e2fsck on a mounted filesystem may cause
SEVERE filesystem damage.

Do you really want to continue (y/n)? yes

/doc: recovering journal
/doc: clean, 29/393600 files, 32977/787177 blocks

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What does this 32977/787177  blocks mean?Is it space used or is it some error?
Is fcsk adequate or shud i use other command?
Plz help :((
Rajev