Unexpected busfree errors

[P M Oliver]

I have RedHat 6.0 using kernel 2.2.10 and using 5.1.19 version of the
aic7xxx driver connected to an Overland DLT7000 tape drive

I have a multifile tape but when I try and read the second file on the
tape I get the following error messages  towards the end of the second
file.

Jul 23 09:35:13 munin kernel: (scsi0:0:4:-1) Unexpected busfree,
LASTPHASE = 0xa0, SEQADDR = 0x14f
Jul 23 09:35:48 munin last message repeated 7 times
Jul 23 09:36:50 munin last message repeated 12 times
Jul 23 09:37:00 munin last message repeated 2 times


Boot messaged for Scsi devices

(scsi0) <Adaptec AIC-7890/1 Ultra2 SCSI host adapter> found at PCI 6/0
(scsi0) Wide Channel, SCSI ID=7, 32/255 SCBs
(scsi0) Downloading sequencer code... 374 instructions downloaded
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.19/3.2.4
       <Adaptec AIC-7890/1 Ultra2 SCSI host adapter>
scsi1 : SCSI host adapter emulation for IDE ATAPI devices
scsi : 2 hosts.
(scsi0:0:4:0) Synchronous at 20.0 Mbyte/sec, offset 15.
  Vendor: QUANTUM   Model: DLT7000           Rev: 204B
  Type:   Sequential-Access                  ANSI SCSI revision: 02
Detected scsi tape st0 at scsi0, channel 0, id 4, lun 0
(scsi0:0:6:0) Synchronous at 20.0 Mbyte/sec, offset 15.
  Vendor: OVERLAND  Model: LXB               Rev: 0331
  Type:   Medium Changer                     ANSI SCSI revision: 02
Detected scsi generic sgb at scsi0, channel 0, id 6, lun 0
scsi : detected 1 SCSI tape total.


command used to read files on tape

dd if=/dev/nst0  ibs=131072 of=/home/pmo/file.1;dd if=/dev/nst0
ibs=131072 of=/home/pmo/file.2

Can anybody help?

thanks

Pete Oliver
Systems Manager




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#Dr. Peter Oliver (p.m.oliver at rl.ac.uk)             #
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