Connection fails and currupt log

One of our customers has SQL server 2000 installed
This has been working perfectly for over a year
Now various databases have started to return errors when queries are
run on the data from VB or Query Analyser.
A typical error is:
[Microsoft][ODBC SQL Server Driver][DBNETLIB]ConnectionCheckForData
(CheckForData()).
Server: Msg 11, Level 16, State 1, Line 0
General Network Error. Check your network documentation
Connection broken
Not all the database produce errors but there appears to be no pattern
to which databases still work.
I have two backup copies of the main database they use. The main
database its self and one of the backups produce errors yet the other
backup, taken on the same day does not.
Looking at the error log (attached) there seems to be a lot of
"corrupt" entires.
Any suggestions* If you see corruption, then --
1. Check system and app event logs for details on any hardware corruption.
2. contact your hardware vendors to run some tests, diagnostics, etc and
also check for firmware upgrades.
3. Only then, RESTORE from your last healthy SQL Backup.
4. If you dont have a backup, then you could try to "Repair" the database
using "dbcc checkdb".
Thanks,
Vikram
Vikram Jayaram
Microsoft, SQL Server
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