Date: Fri, 8 Mar 1996 12:09:07 -0600 (CST) From: "Lars Fredriksen" <fredriks@mcs.com> To: wilker@hopf.math.purdue.edu Cc: freebsd-scsi@freebsd.org Subject: NEC Cd changer Message-ID: <m0tv6bD-0003kuC@mercury.mcs.com>
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Hi, Have you seen any problems with the scsi request to the NEC 7 cd changer timeout? I get messages like this sometimes: cd(0) request timed out received unexpected ANS(0x22) bus reset The above messages are parafrased... The controller is a 1742. The chain looks like this: External: Internal: TERM -> HP-DAT -> NEC changer -> Controller -> HD1 -> HD0 -> TERM If I replace the NEC changer with a Toshiba 3401, there is no problem. Unfortunately when I do that I have to change the cable between the cd and the controller, so just because the Toshiba CD-ROM work doesn't mean that there is a problem with the NEC. It could be a cable problem, but that would not say much about the quality of the cable since the one used with the NEC is brand new. I did try removing the HP-DAT and using the internal terminator on the NEC, but that didn't change anything, so it doesn't appear to be a terminator problem. I had to take out HD1 (Toshiba 538), because it and the NEC did not get along at ALL. The BIOS would report that the HD1 had an internal error, or if it did manage to probe it right, you could not read sector 0 from it. So either the NEC doesn't adhere to the SCSI standard really well, or I have a bad cable between the NEC and the controller. Anyone seen anything like this? I hate to have to go out and spend another $50 on a SCSI-2 to SCSI-2(connector wise) cable, but that might be what I have to do. Lars Lars -- ------------------------------------------------------------------- Lars Fredriksen fredriks@mcs.com (home) lars@fredriks.pr.mcs.net (home-home)
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