Date: Thu, 24 Jun 1999 23:09:01 -0700 From: bmah@CA.Sandia.GOV (Bruce A. Mah) To: trulock@bellatlantic.com (Alan Trulock) Cc: freebsd-questions@FreeBSD.ORG Subject: Re: ahc0: Data Parity Error Detected during address or write data phase Message-ID: <199906250609.XAA04422@stennis.ca.sandia.gov> In-Reply-To: Your message of "Fri, 25 Jun 1999 03:20:39 GMT." <3772f3b6.1804666@core.iconnet.net>
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--==_Exmh_-2054491016P Content-Type: text/plain; charset=us-ascii If memory serves me right, Alan Trulock wrote: > I just put together a "new" box out of spare parts that I dug out of a > pile of scrap metal (really). > > The system is running smoothly except I get the following error > repeatedly. > > ahc0: Data Parity Error Detected during address or write data phase > > Here are some pieces form dmesg: > > ahc0: <Adaptec 2940 SCSI adapter> rev 0x00 int a irq 9 on pci0.15.0 > ahc0: aic7870 Wide Channel A, SCSI Id=7, 16/255 SCBs I'm no expert on SCSI problems, but here are a few ideas: First, if this is a Adaptec 2940UW, make sure you're not trying to use all three connectors on it at once (wide internal, narrow internal, and wide external). It won't like this. (Actually, I think there's a newer model which *does* permit using all three connectors.) > Waiting 15 seconds for SCSI devices to settle > da0 at ahc0 bus 0 target 0 lun 0 > da0: <SEAGATE ST41650 6414> Fixed Direct Access SCSI-2 device > da0: 5.000MB/s transfers (5.000MHz, offset 15), Tagged Queueing > Enabled > da0: 1350MB (2766300 512 byte sectors: 255H 63S/T 172C) > da1 at ahc0 bus 0 target 1 lun 0 > da1: <QUANTUM LP105S 910109405 3.1> Fixed Direct Access SCSI-2 device > da1: 4.032MB/s transfers (4.032MHz, offset 8) > da1: 100MB (205561 512 byte sectors: 64H 32S/T 100C) > changing root device to da0s1a > ahc0: Data Parity Error Detected during address or write data phase > ahc0: Data Parity Error Detected during address or write data phase > ahc0: Data Parity Error Detected during address or write data phase > ahc0: Data Parity Error Detected during address or write data phase Other thoughts: Check your termination...any drive on an end of the SCSI chain needs termination. If you only use one connector, the card *can* auto-terminate the SCSI bus for you if so configured. Some folks have had problems with this, but it's always Done The Right Thing (TM) for me. Also make sure you aren't exceeding the cable length limits. I just fixed a bunch of SCSI problems on one of my systems by using the shortest cables I could find. If all this fails, you could try burning the traditional black candles and sacrificing a goat over the system. :-) Good luck, Bruce. --==_Exmh_-2054491016P Content-Type: application/pgp-signature -----BEGIN PGP MESSAGE----- Version: 2.6.2 iQCVAwUBN3Mc/KjOOi0j7CY9AQEGIgQAgkT7rCvDorrqFaUjzqWZrMwQvt6d3UQd 9dq49OgPzkKtX1gSebl67IfNmi/Lf1d+t0WfYjBEJ6qKdw3jKo5RH1CkRVjE0PVx R9/GaEwZTxkN5iakgquPHak98SSGKqXwLqwJmV4Q5o/VOAS9LQ5NqvvYu37JC0FC qwyl5IxKTQ8= =/UUy -----END PGP MESSAGE----- --==_Exmh_-2054491016P-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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