Date: Wed, 21 Aug 1996 22:28:09 +0200 (MET DST) From: Stefan Esser <se@zpr.uni-koeln.de> To: Eric Blood <eblood@winky.reno.nv.us> Cc: freebsd-bugs@freebsd.org Subject: Re: NCR825 problem Message-ID: <199608212028.WAA07186@x14.mi.uni-koeln.de> In-Reply-To: <12434.840521241@winky> References: <12434.840521241@winky>
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Eric Blood writes: > > On a SuperMicro motherboard, NCR825 SCSI, 1 gig wide SCSI drive > and a default kernel from both the 2.1.0 CD and the 2.2-960501-SNAP > CD I get the following: > > changing root device to sd0a > de0: enabling AUI port > (very long pause) > ncr0: aborting job ... > ncr0:2: ERROR (90:0) (8-0-0) (0/13) @ (a54:50000000). > script cmd = 740a8700 > reg: de 00 00 13 47 00 0f 0f 35 08 81 00 90 00 0f 02. I assume that your CD-ROM drive is on SCSI ID 2 ? Seems that some time-out occured. The error code indicates that the NCR chip's internal processor was interrupted (0x90 == DMA Fifo Empty + Abort) by the host CPU. It seems the NCR chip was waiting for the drive to complete some command, but it took too long and a time expired. > ncr0: restart (fatal error). > sd0(ncr0:0:0): COMMAND FAILED (9 ff) @f0c30a00. > sd0(ncr0:0:0): WIDE SCSI (16 bit) enabled. > sd0(ncr0:0:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8. > sd1(ncr0:1:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8. Seems the devices at SCSI ID 0 and 1 recovered and are back to normal again. What is the transfer mode of device with ID 2 ? > Only once did this cause problems because the install program > said it couldn't see the CD. Rebooting fixed this. Guess your CD-ROM takes too long to complete self-test. What model is it ? > When I install a custom kernel with all of the unnecessary drivers > removed, this error doesn't occur. Also, for either case, the > system will stay up for days with no problems. Hmm, might it have been caused by a cold boot at the time you observed the aborted command, while the later system start-up was a warm boot with all devices spun up and ready ? Regards, STefan
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