Hi, all!
> > Also, check the cache
> > setting on the drives itself. Maybe the drives are loosing power or
> > getting reset while data is in their cache.
>
> I'm starting to suspect something like this. The controller's setting
> for the individual drives' caches is "OFF". But these (Seagate ST3500841NS)
> would not be the first ATA/SATA drives to "lie" about their cache for
> "performance".
Seems like
for i in 0 1 2 3 4 5
do
megarc -pSetCache -WCE0 -SaveCacheSetting -ch0 -id$i -a0
done
did the trick. This is supposed to disable the physical drives'
write cache and save this setting in the drives' NVRAM, if supported.
I don't know why simply setting the WC to "off" in the controller's
BIOS setup tool didn't have the same effect. I'm keeping my fingers
crossed ;-)
Time to re-enable softupdates and do some more stress testing.
Up to now the system survived two times "make installworld && reboot"
after I changed the settings.
Thanks to the guys keeping the amr driver up-to-date. The Linux
"megamgr" utility works just fine. If I find the time, I'll make
a port.
Regards,
Patrick M. Hausen
Leiter Netzwerke und Sicherheit
--
punkt.de GmbH Internet - Dienstleistungen - Beratung
Vorholzstr. 25 Tel. 0721 9109 -0 Fax: -100
76137 Karlsruhe http://punkt.de
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