Date: Fri, 07 Sep 2001 23:45:28 +0100 From: ian j hart <ianjhart@ntlworld.com> To: Dave Uhring <duhring@charter.net> Cc: Randall Hopper <aa8vb@nc.rr.com>, stable@FreeBSD.ORG Subject: Re: UDMA ICRC error reading fsb (?) Message-ID: <3B994E08.FF3BE9C4@ntlworld.com> References: <20010906204356.A4116@nc.rr.com> <auto-000028388966@dc-mx05.cluster1.charter.net> <20010907180403.A1472@nc.rr.com> <auto-000027449537@dc-mx04.cluster1.charter.net>
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Dave Uhring wrote: > > On Friday 07 September 2001 17:04, Randall Hopper wrote: > > Dave Uhring: > > |On Thursday 06 September 2001 07:43 pm, Randall Hopper wrote: > > |> What do these messages mean? Are CRCs done by the IDE > > |> controller on DMA transfers and they're coming up wrong? > > |> > > |> ad0s2a: UDMA ICRC error writing fsbn 3283483 of 396704-396713 > > |> (ad0s2 bn 3283483; cn 204 tn 98 sn 49) retrying > > | > > |Your drive is dying. Back it up and replace it. I think you are being a tad premature. There have been plenty of posts on this subject, both on stable and hardware. IIRC none of them were bad disks. Randall, 1) post a copy of dmesg so we can see what hardware you have. 2) measure the cable - M/B to drive. > > > > Ok, thanks. But what do these messages "mean" on a technical level? > > > > And could these just as well indicate a marginal cable, bad > > connector, loose connector, or the other hard drive on the controller > > being a bit flakey? > > > > Randall > > CRC's (16 bit cyclic redundancy check characters) have been done on > controllers since we had to use floppies. The first Winchester drive > interface I ever designed back in 1979 had a Fairchild 9401 (IIRC) CRC > generator chip on it. The writes are failing. You "may" have marginal > cabling or loose or corroded connectors. > > If you wish to keep using the drive, replace the cable and in doing so > your contacts will also wipe clean. > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message -- ian j hart To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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