Emmanuel Florac schrieb:
> Le Wed, 22 Sep 2010 09:26:53 +0200 vous écriviez:
> > Infortrend RAID with BBU -> DRBD -> LVM -> XFS
> I'm not sure to understand; DRBD is used to mirror devices, are you
> using 2 Infortrend arrays, or one split into two volumes?
yes, 2 drbd/heartbeat nodes, 2 Infortrend systems
> In any case, battery protected write cache shouldn't create any
> corruption (OTOH it will enhance performance dramatically). AFAIK all
> RAID arrays mirror the drives cache in the array cache until it hits
> platters. There may be some "cheating" hard drives (I heard that WD
> isn't always totally clear about cache policies) but Seagate and Hitachi
> professional grade drives definitely are OK. Hint: don't use desktop
> hard drives in any case because they probably cheat about cache
The drives are 15000 RPM SAS drives, so no desktops drives. As far as
I understand the documentation, when the "Delayed Drive Write" RAID
option is enabled, there is the possibility of data loss.
> I see that you may have been running rsync at the time of failure; there
> are quite a lot of quite unclear (to me at least) cases of XFS failures
> when running rsync to copy large amount of data. I it a fully 64 bits
There were many more lines with this error in the logs. Triggered by
smbd, rsync, bacula...