Date: Thu, 10 Mar 2005 09:04:29 -0700 From: "Kenneth D. Merry" <ken@freebsd.org> To: Fritz Heinrichmeyer <fritz.heinrichmeyer@fernuni-hagen.de> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: error messages from easyraid ex array Message-ID: <20050310160428.GA30406@nargothrond.kdm.org> In-Reply-To: <42303E74.9060301@fernuni-hagen.de> References: <42303E74.9060301@fernuni-hagen.de>
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On Thu, Mar 10, 2005 at 13:32:52 +0100, Fritz Heinrichmeyer wrote: > Hello, > > sometimes i see following messages with FreeBSD-5.3, ahc driver and an > easyraid ex system. We have two identical boxes one connected to another > system has no problem. The problematic error messages occur when > berkeley-db files are massaged by cyrus imap server. > > I cannot believe there is a media error on an raid 5 system that is not > announced at the control panel of the raid box. Well, firmware on the RAID box will do whatever the authors wrote it to do. In theory, you're right. On a non-critical RAID-5 array, they should be able to recover from any single drive read error. If your array is critical, though (i.e. you've lost one disk), you won't be able to recover from a read error. > Driver: > > ahc2: <Adaptec 29160 Ultra160 SCSI adapter> port 0x3800-0x38ff mem > 0xf7ed0000-0xf7ed0fff irq 11 at device 4.0 on pci1 > da1 at ahc2 bus 0 target 5 lun 0 > > Errors: > > (da1:ahc2:0:5:0): READ(10). CDB: 28 0 0 71 6a 4f 0 0 10 0 > (da1:ahc2:0:5:0): CAM Status: SCSI Status Error > (da1:ahc2:0:5:0): SCSI Status: Check Condition > (da1:ahc2:0:5:0): MEDIUM ERROR asc:0,0 > (da1:ahc2:0:5:0): No additional sense information > (da1:ahc2:0:5:0): Retrying Command (per Sense Data) That's a little bit of a strange error, because they only set the sense key but not the asc/ascq. In any case, it looks like we retried it. If the device was still returning errors, you'd eventually see a "Retries Exhausted" message. Ken -- Kenneth Merry ken@FreeBSD.org
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