hard disk problem

[Valery]

Hello!

I use FreeBSD 4.4 Stable
I faced the following problem.

Here is a part from messages
-----------------------------------
ad2s1e: hard error reading fsbn 32727951 of 16363936-16364175 (ad2s1 bn
32727951; cn 32468 tn 3 sn 18) status=59 error=40
ad2s1e: hard error reading fsbn 32727967 of 16363952-16364175 (ad2s1 bn
32727967; cn 32468 tn 3 sn 34) status=59 error=40

------------------------------------

What sort of problem with my hard disk
Is it critical?

Yours sincerely,
     Valery