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Date:      Fri, 15 Oct 1999 13:25:00 -0700 (PDT)
From:      Sabrina Minshall <sabrina@accesscom.com>
To:        questions@freebsd.org, scsi@freebsd.org
Subject:   ahc0: Someone reset channel 0
Message-ID:  <199910152025.NAA12085@shell.accesscom.com>

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Hi guys,
   I'me getting the following error message and the systems
   seems to freeze. Any idea what's going on? It's a 2940UW
   scsi adapter.

ahc0: Someone reset channel A

(da0:ahc0:0:6:0): SCB 0xc - timed out while idle, LASTPHASE == 0x1, SEQADDR == 0x6
(da0:ahc0:0:6:0): Queuing a BDR SCB
(da0:ahc0:0:6:0): SCB 0xc - timed out while idle, LASTPHASE == 0x1, SEQADDR == 0x9
(da0:ahc0:0:6:0): no longer in timeout, status = 34b
ahc0: Issued Channel A Bus Reset. 1 SCBs aborted
(da0:ahc0:0:6:0): WRITE(10). CDB: 2a 0 0 5e 4d 10 0 0 a 0 
(da0:ahc0:0:6:0): ILLEGAL REQUEST asc:24,0
(da0:ahc0:0:6:0): Invalid field in CDB sks:cb,1

Here's the system configuration:

<(truncated) output from dmesg>

Waiting 15 seconds for SCSI devices to settle
de1: autosense failed: cable problem?
changing root device to da0s3a
da1 at ahc0 bus 0 target 8 lun 0
da1: <QUANTUM XP34550J LYK8> Fixed Direct Access SCSI-2 device 
da1: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da1: 4341MB (8890760 512 byte sectors: 255H 63S/T 553C)
cd0 at ahc0 bus 0 target 2 lun 0
cd0: <PIONEER CD-ROM DR-U24X 1.01> Removable CD-ROM SCSI-2 device 
cd0: 10.000MB/s transfers (10.000MHz, offset 8)
cd0: Attempt to query device size failed: NOT READY, Medium not present
da0 at ahc0 bus 0 target 6 lun 0
da0: <IBM DCAS-34330W S61A> Fixed Direct Access SCSI-2 device 
da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
da0: 4134MB (8467200 512 byte sectors: 255H 63S/T 527C)

<end dmesg>

   Appreciate any help.


   Sabrina



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