Why does Essbase become corrupted?

I see alot of advice on how to restore Essbase but very little information on why a database would become corrupted in the first place.
I have a database in 9.3.1 and I have a calc script that is run every evening that clears and copies data in the database. On Saturday night while this calc was running, the database suddenly became corrupted and would no longer start until a restored copy was put in place. This was the error:
A read from file [e:\Hyperion\AnalyticServices\APP\APPLICATION\DATABASE\ess00001.ind], with handle [5] from offset [21921792] for [8192] bytes, failed with error [0] and O/S return code [38] after [0] bytes.
Unable to Read Information From [5]
Essbase Internal Logic Error [7333]
The calc hasn't changed in a few months and the outline had not changed as well.
I would like to avoid having to do restores and would really appreciate any insight into why the database would be corrupted so I can try to avoid any future issues.

I've had databases go corrupt when:
1) Some other process tries to, or succeeds in gabbing rwrite access to files Essbase is trying to write to (think disk backup software).
2) The Essbase service is stopped while retrieves or calcs (and I suppose loads as well although I've never observed that) are occurring.
3) Weirdo hardware issues -- I've had RAID arrays die on me (and others) because of faulty hardware but this was a once in a career event.
4) Essbase/the OS runs out of disk space.
That's pretty much it for modern versions of Essbase. Older versions would go corrupt if you looked sideways at them but you're on 9.3.1, so that should not be an issue.
Regards,
Cameron Lackpour

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