Date: Sat, 08 Sep 2001 14:15:52 +0100 From: ian j hart <ianjhart@ntlworld.com> To: Marius Strom <marius@marius.org> Cc: "stable@FreeBSD.ORG" <stable@FreeBSD.ORG> Subject: Re: UDMA ICRC error reading fsb (?) Message-ID: <3B9A1A08.539E25ED@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> <3B994E08.FF3BE9C4@ntlworld.com> <20010907234848.A1323@marius.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Marius Strom wrote: > > FWIW, I had this error and assumed it was cabling. I've spent the last > few hours copying data of what is now a dead disk and putting it back on > a new disk. YMMV. What do you mean by "dead"? The way I describe "dead" being able to copy data off it is a neat trick. eg drive doesn't spin. What did you do about the cabling problem? What hardware do you have? > > On Fri, Sep 07, 2001 at 11:45:28PM +0100, ian j hart wrote: > > 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 > > -- > Marius Strom <marius@marius.org> > Professional Geek/Unix System Administrator > URL: http://www.marius.org/ > http://www.marius.org/marius.pgp 0xF5D89089 *updated 2001-02-26* > > It is a natural law. Physics tells us that for every action, there must be an > equal and opposite reaction. They hate us, we hate them, they hate us back and > so, here we are, victims of mathematics. > -- Londo, "A Voice in the Wilderness I" -- ian j hart To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3B9A1A08.539E25ED>