[SunHELP] Tape drive problem

[Hichael Morton]

the 411 device is "regular" scsi device.
it requires a terminator at the end of the scsi chain to work properly.
(on the 411 device according to your description.)
i would suggest installing the appropriate terminator and testing agin.

a 411 device will not work connected to a differential scsi controller.

can you see the tape drive from the obp?
what is the scsi address of the tape drive?

o'reilly and associates now has a book out on google.  you might find
it helpful.

--- "Michael A. Turner" <mturner at whro.org> wrote:
> 	Hello all,
> 	
> 	we are trying to get the tape drive attached to our sunfire 280R
> working and I am having problems. First the background info. The tape
> drive
> is External in a 411 style case. It is a DDS4 tape drive, single
> tape. We
> are running Solaris 8 on this system. The tape drive is raw device
> /dev/rmt/0 . The drive has a brand new fuji DDS4 tape in it that came
> with
> the system. All teh examples below are done once I am SU into root.
> The
> cable to the device looks tight. Their is a storedge array but that
> is
> connected to a different SCSI connector on the back of the sunfire.
> There is
> no terminator on the Tape drives other connector and nothing is
> attached to
> it.
> 
> 
> 	Now the symptoms.
> 
> mt -f /dev/rmt/0 status shows
> HP DDS-4 DAT (Sun) tape drive:
>    sense key(0x6)= Unit Attention   residual= 0   retries= 0
>    file no= 0   block no= 0
> 
> mt -f /dev/rmt/0 rewind and mt -f /dev/rmt/0 erase seem to both work.
> The
> drive operates as if it is working
> 
> tar has problems though. 
> 
> /users/mturner [11:31am]->tar cvf /dev/rmt/0 setpath
> a setpath 1 tape blocks
> /test [11:34am]->tar xvf /dev/rmt/0 setpath
> tar: tape read error
> 
> on the Console I see
> 
> Aug 26 11:34:48 TeamWHRO scsi: WARNING: /pci at 8,700000/scsi
> @6,1/st at 4,0
> (st18):
> Aug 26 11:34:48 TeamWHRO         SCSI transport failed: reason
> 'unexpected_bus_free':giving up
> 
> the stats for file setpath are
> 
> -rwxrwxrwx   1 root     other        246 Jul 31 15:19 setpath
> 
> running the command again I get
> 
> /test [11:34am]->tar xvf /dev/rmt/0 setpath
> tar: tape read error
> 
> and to the console
> 
> Aug 26 11:39:57 TeamWHRO scsi: WARNING: /pci at 8,700000/scsi at 6,1
> (glm1):
> Aug 26 11:39:57 TeamWHRO        gross error - not connected
> Aug 26 11:39:57 TeamWHRO scsi: WARNING: /pci at 8,700000/scsi at 6,1
> (glm1):
> Aug 26 11:39:57 TeamWHRO        got SCSI bus reset
> Aug 26 11:39:57 TeamWHRO scsi: WARNING: /pci at 8,700000/scsi at 6,1/st at 4,0
> (st18):
> Aug 26 11:39:57 TeamWHRO        SCSI transport failed: reason
> 'reset':
> giving up
> 
> attempts on a larger file tend to go much more poorly
> 
> -rw-r--r--   1 root     other    9095680 Aug 26 11:14
> Archive27546.tar
> 
> Taking an extremely long time to time out. Kill -9 will not stop the
> tar
> process
> 
> /users/mturner [12:47pm]->tar cvf /dev/rmt/0 Archive27546.tar
> a Archive27546.tar 17765 tape blocks
> tar: write error: I/O error
> 
> With the same sort of SCSI error going to the console 
> 
> Aug 26 12:49:17 TeamWHRO scsi: WARNING: /pci at 8,700000/scsi at 6,1
> (glm1):
> Aug 26 12:49:17 TeamWHRO        got SCSI bus reset
> Aug 26 12:49:17 TeamWHRO scsi: WARNING: /pci at 8,700000/scsi at 6,1/st at 4,0
> (st18):
> Aug 26 12:49:17 TeamWHRO        SCSI transport failed: reason
> 'reset':
> giving up
> 
> Control C and Control Break do not stop the operation. The telnet
> window is
> locked in the tar command.
> again we see kill -9 failing
> 
> /users/mturner [12:51pm]->ps -A | grep tar
>  28322 pts/4    0:00 tar
> /users/mturner [12:57pm]->kill -9 28322
> /users/mturner [12:58pm]->ps -A | grep tar
>  28322 pts/4    0:00 tar
> 
> ten minutes later I get this at the console. I see killed at the
> telnet
> window
> 
> Aug 26 12:59:26 TeamWHRO scsi: WARNING:
> /pci at 8,700000/scsi at 6,1 (glm1):
> Aug 26 12:59:26 TeamWHRO        Connected command timeout for Target
> 4.0
> Aug 26 12:59:26 TeamWHRO scsi: WARNING: /pci at 8,700000/scsi at 6,1
> (glm1):
> Aug 26 12:59:26 TeamWHRO        got SCSI bus reset
> Aug 26 12:59:26 TeamWHRO scsi: WARNING: /pci at 8,700000/scsi at 6,1/st at 4,0
> (st18):
> Aug 26 12:59:26 TeamWHRO        SCSI transport failed: reason
> 'timeout':
> giving up
> 
> Googling so far has turned up ntohing. does anyone havea  clue to
> what is
> causing this?
> 
> 
> Michael A. Turner
> Systems Engineer WHRO
> michael.turner at whro.org
> http://www.whro.org
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