Jeff Breidenbach wrote:
The crash itself appears to have been caused by extreme
heat buildup on the disk drives, which basically spend 100%
of their time doing seeks. It's possible that modern high
density drives are more susceptable to heat problems than their
forebearers. In response, I've added a number of additional
cooling fans to address this problem (including one more
on Thursday).
Do you have any temperature sensors? It'd be interesting
to know what temperature your drives were at back before
the crash, and what temperature they're at now. I think
there's a well-established relationship between temperature
and MTBF. http://www.seagate.com/docs/pdf/whitepaper/fdb_motor_tp574.pdf
says that a 6 month test at a temperature 30 degrees centigrade
above the rated max temp of a drive is equivalent to a 5 year
test at the rate temperature...
- Dan
--
Dan Kegel
http://www.kegel.com
http://counter.li.org/cgi-bin/runscript/display-person.cgi?user=78045
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