Running NW 6.5.5

I am having to do the third pool rebuild on my DATA volume in two years. To
me that seems a bit much. Twice the server began a repeating abend while the
nightly backup was running. The other time, I was getting daily errors from
the backup and the pool rebuild fixed it.

Yes, we are running BE (9.1) I think. I have updated the OFM, as that was
supposed to be a cause of data corruption in the pool, but that was before
the problem started. Any ideas as to what else might be causing this?

Is there a better backup solution out there that doesn't come with it's own