Date: Tue, 22 Jan 2002 13:01:11 -0800 (PST) From: John Polstra <jdp@polstra.com> To: hardware@freebsd.org Subject: Re: Question about a strange hardware problem Message-ID: <XFMail.20020122130111.jdp@polstra.com>
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Following up on a question I asked in mid-December: > I've got an intermittent hardware problem on one of the CVSup mirror > sites, and I would appreciate some experienced opinions about > whether it's likely to be in the SCSI controller, the SCSI cable, > the hard drive, or elsewhere. The symptom is that the checkouts.cvs > file which maintains state between CVSup updates occasionally gets > 1-bit errors at random places in it. I haven't seen any similar > errors in the actual content on the mirror; but it is on a different > drive, its access patterns are different, and errors there might be > less noticeable. The errors in checkouts.cvs cause updates to break > until I intervene manually, so I notice those pretty quickly. I moved the offending file to the other disk drive, but after several weeks it once again got a 1-bit error in it. That more or less ruled out the drives as the cause of this problem. I was able to visit the machine today, and I replaced the RAM with new Micron ECC RAM. It turns out the machine had non-ECC RAM in it before. (I didn't build it and couldn't remember what it had installed.) I have a strong feeling this is going to fix the problem. If not, I'll follow up again. John To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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