DB backup failure on 3rd party tool

Hi,
We are backing up this SQL database server using 3rd party
tool from CommVault. About once every a couple of months
the backups stop working. The backup jobs on CommVault
just hang. We have to reboot the SQL server to fix the
problem. And rebooting has been working well so far. We
had CommVault support worked on the problem and they
didn't find anything in their error log. So we started
looking at the windows 2000 server/SQL server 2000 side
trying to find any clue. I looked at SQL errorlog, system
Event Viewer but didn't see anything. Do you have any
suggestions about where else can I look? And any advice of
how to debug this prolem will be greatly appreciated! LiNothing in SQL logs and Window logs: you better ask the vendor. They must
have a clue.
"Li" <lichenzhao@.yahoo.com> wrote in message
news:00c001c3a305$7fa0bb70$a501280a@.phx.gbl...
> Hi,
> We are backing up this SQL database server using 3rd party
> tool from CommVault. About once every a couple of months
> the backups stop working. The backup jobs on CommVault
> just hang. We have to reboot the SQL server to fix the
> problem. And rebooting has been working well so far. We
> had CommVault support worked on the problem and they
> didn't find anything in their error log. So we started
> looking at the windows 2000 server/SQL server 2000 side
> trying to find any clue. I looked at SQL errorlog, system
> Event Viewer but didn't see anything. Do you have any
> suggestions about where else can I look? And any advice of
> how to debug this prolem will be greatly appreciated! Li