Date: Sun, 09 Sep 2001 03:10:22 +0100 From: ian j hart <ianjhart@ntlworld.com> To: Randall Hopper <aa8vb@nc.rr.com> Cc: stable@FreeBSD.ORG Subject: Re: UDMA ICRC error reading fsb (?) Message-ID: <3B9ACF8E.2536E4A9@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> <20010908202004.A1101@nc.rr.com>
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Randall Hopper wrote: > > ian j hart: > |Randall Hopper: > |> 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 > | > |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. > > Just replaced the 18" ATA66 cable with a new 20" ATA66 cable. No CRC > errors yet but I'll keep an eye out for more, and do a mfgr drive-test run > just to be safe. I hope you mean ATA100 cable. > > I've attached a dmesg. This is an ASUS A7M266 MB with two UltraDMA 100 > hard disks on the primary controller: a Maxtor DiamondMax 60 60GB master, > and an IBM Desktar 60GXP 60GB slave. The Maxtor is the new one, and the > one that had the CRC errors. In which case you probably don't have the problem I'm describing. Does anyone know the cable length spec for UDMA33/66/ATA100? > > On a related note, I'd read that if you have two IDE hard disks on an ATA66 > cable, the master always goes in the middle (and if only one, it goes at > the end). However, this Intracom ATA66 cable has the end connector > unconditionally labeled Master(0) and the middle connector labeled > Slave(1). Are these guys confused, ...or am I? Maxtor say: Blue - M/B | | | Grey - Slave | Black - Master ASAIK the drive jumpers still determine the drive ID. Maybe the standard supports cable select? Anyone know? You do need the blue connector on the M/B though, screws the UDMA cable detection otherwise. Note that the master has the longest cable run! > > Randall > > -- > Randall Hopper > aa8vb@nc.rr.com -- 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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