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Re: Could drbd randomly flip bits? Was: Database page corruption on disk occurring during mysqldump on a fresh database and Was: Spontaneous development of supremely large files on different ext3 filesystems



I failed over the server and ran a short backup and there were no "didn't compare" errors where on the first server, they are there pretty reliably. I guess this confirms some hardware on the first server is flipping bits. Essentially, users could have any number of munged files (most files are binary) since the problem surfaced a few weeks ago, and there'd be know way to know. Unfortunately, the secondary server was off for a short time at one point, so even if the munging were taken place on the I/O subsystem and not in RAM, it is possible that some blocks got copied badly to the secondary server.

Anyway, it seems the problem is definitely hardware and not due to either ext3, drbd or mysql!
--

Maurice Volaski, mvolaski aecom yu edu
Computing Support, Rose F. Kennedy Center
Albert Einstein College of Medicine of Yeshiva University


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