> -----Original Message----- > From: Mark Wong [mailto:markwkm@xxxxxxxxx] > Sent: Thursday, August 07, 2008 12:37 PM > To: Mario Weilguni > Cc: Mark Kirkwood; greg@xxxxxxxxx; david@xxxxxxx; pgsql- > performance@xxxxxxxxxxxxxx; Gabrielle Roth > Subject: Re: [PERFORM] file system and raid performance > > I have heard of one or two situations where the combination of the > disk controller caused bizarre behaviors with different journaling > file systems. They seem so few and far between though. I personally > wasn't looking forwarding to chasing Linux file system problems, but I > can set up an account and remote management access if anyone else > would like to volunteer. [Greg says] Tempting... if no one else takes you up on it by then, I might have some time in a week or two to experiment and test a couple of things. One thing I've noticed with a Silicon Image 3124 SATA going through a Silicon Image 3726 port multiplier with the binary-only drivers from Silicon Image (until the PM support made it into the mainline kernel - 2.6.24 I think, might have been .25) is that under some heavy loads it might drop a sata channel and if that channel happens to have a PM on it, it drops 5 drives. I saw this with a card that had 4 channels, 2 connected to a PM w/5 drives and 2 direct. It was pretty random. Not saying that's happening in this case, but odd things have been known to happen under unusual usage patterns.
