Date: Fri, 4 Apr 1997 16:05:48 -0500 (EST) From: Security Administrator <sadmin@roundtable.cif.rochester.edu> To: scsi@freebsd.org (FreeBSD Scsi) Subject: exabyte problems Message-ID: <199704042105.QAA18369@roundtable.cif.rochester.edu>
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Howdy, I have an Exabyte 8500 and it is NOT working properly. I was assured by its previous owner that the drive was in perfect working condition, but the moment that I added it to my SCSI chain on my FreeBSD 2.2.1 system, it barfed. To be specific, I have an Adaptec 2940UW card with two SCSI-III drives on one chain and the SCSI-I tape drive off another ribbon cable. Whenever I try to write to the drive, it has a slew of write errors that kill whatever process is trying use the device. Neither dump nor tar are immune. I made sure that the Adaptec negotiates with the drive for 8-bit operation, and the tape drive comes up perfectly at boot time, ie., it is properly identified at the right LUN and with the right name. I have tried a little experiment. I happen to have an Adaptec 1542B kicking around, and I tried to integrate that into my system. With that card, there is a new problem. The card comes up fine... unique IRQ, DRQ, and AT port addresses and numbers. As far as I can tell, there are NO conflicts and the OS talks to the card fine. At boot time, the card recognizes the tape drive on the scsi chain perfectly. HOWEVER, whenever I try to read/write to the drive, the read/write operation times out. I also can not execute a scsi -f /dev/rst0 -p command... It times out. I originally thought that this was due to an IRQ or DRQ conflict, but the settings are unique and there ARE NO CONFLICTS. Also, whenever I try to terminate the tape drive, the SCSI bus can't locate the 8500. Since the tape drive isn't the last device on the bus connected to the 2940UW, this isn't a problem. But, I thought that the tape SHOULD be properly terminated on the 1542B bus. If anyone has any advice or ideas, I would really appreciate it. Thanks in advance, Josh Pincus -- System Security Administrator Computer Interest Floor University of Rochester Rochester, NY 14627 sadmin@roundtable.cif.rochester.edu
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