Joshua Drake wrote:
During a 41-month period we observed more than 400,000 instances of
checksum mistmatches, 8% of which were discovered during RAID
reconstruction, creating the possibility of real data loss.
They also have a wonderful term they mention, "Silent Data corruptions".
Exactely!
From my experience, the only assumption to be made about storage is that it can
and will fail ... frequently! It is unreliable (not to mention slooow) and
should not be trusted; regardless of the price tag or brand.
This could help detect:
- fs corruption
- vfs bug
- raid controller firmware bug
- bad disk sector
- power crash
- weird martian-like raid rebuilds
Although, this idea won't prevent anything. Everything would still sinisterly
fail on you. The difference is, no more silence.
--
Andrew Chernow
eSilo, LLC
every bit counts
http://www.esilo.com/
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