Hello,

I keep getting this error after trying to do an online backup of the DB2 database to an NFS filesystem:

SQL2025N An I/O error "6" occurred on media ...

Has anyone ever seen this error? Any idea on how to fix it?

I read somewhere on one of the posts here that it may be a locking issue. Here is a response to someone who had the same exact problem that I have:

That's an ENOLCK (errno = 37, or 25 hex). It means that DB2 is trying
to lock a file but can't. I suspect your nfs mounting options are not
allowing locking over nfs.

Here is the thread that has the above answer... I looked at the db2diag.log file and am getting the same errors too.

http://www.thescripts.com/forum/thread180582.html

If this is the solution, does anyone know how to enable locking over nfs? I have options in fstab set to default.

Thanks for the help!

as I remember, this must be a local directory
"This target directory or device must exist on the database server" according the doc

I do backups to an NFS mount all the time on Linux. The instance owner id must be the owner (not just write permission) of the directory you are backing up to.