Date: Thu, 18 Jun 2009 12:00:11 -0400 From: RA Cohen <roy@net-vantage.com> To: freebsd-proliant@freebsd.org Subject: kernel: ciss0: *** SCSI bus speed downshifted, SCSI port Message-ID: <4A3A648B.9070807@net-vantage.com>
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I'm new to this list but probably should have joined several years ago. I'm an independent consultant and I have placed many off-lease Proliants (lately DL 360 and 380 G3's) in the field running FBSD. They are generally problem free, but I've had one recent case that still puzzles me: I had a large ML 530 G2 in service populated with 36 gb drives, in the same server room as 2 DL380 G3's. I train my clients to observe the drive lights daily if possible. One morning the client noticed one drive on the ML530 showing red, and two drives on one of the DL380's as red (this server was build with two mirrored drives (for os) in one array, and the remaining 4 striped drives (for data) in the other). The third server was normal with no failed drives. I replaced the drive on the 530, the array rebuilt and all was and continues to be, well. Not so for the DL380. The failed drives were each part of different arrays, that was good I thought. They were replaced, the array rebuilt, and we had six green drives. Until the next day when there were one or two failures - different drives - I kept playing around shuffling drives (at this point I knew I had to rebuild the machine and we had very good tape backups thanks to bacula and SDLT drive). The arrays would rebuild, but as soon as almost all the data was restored the array would fail. Long story short, I concluded there were environmental problems that caused the original failures, my feeling was there very well could be damage to the embedded 5i SCSI controller. The server was replaced with a new (used) DL380 G3 and all seems ok until this morning (about a week after replacement) when I see this in the log: Jun 17 18:03:16 dodson1 kernel: ciss0: *** SCSI bus speed downshifted, SCSI port 2 Jun 17 18:08:21 dodson1 kernel: ciss0: *** SCSI bus speed downshifted, SCSI port 2 I've google'd and searched for this kind of message and am still unsure what it means exactly. Does the bus downshift in reaction to a specific problem and then upshift? Or is there a problem lurking waiting to rear its ugly head? I'm also uneducated as to HP/Compaq's pro-active drive monitoring that is integral to these servers. I wish there were a comprehensive summary of hardware-related messages for FreeBSD on Proliants. The two seem to go together quite well in most situations. Thanks in advance for any and all help, -Roy -- Roy A Cohen Network Advantage LLC www.net-vantage.com 413.223.9007 -------------------------------------------------- "Bringing Cost-Saving, State-of-the-Art Technology Solutions to Small and Mid-Size Organizations"
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