Problem with Wangtek SCSI Tape streamer with DPT SCSI controller.

Problem with Wangtek SCSI Tape streamer with DPT SCSI controller.

Post by Raffaele Victor Rafa » Thu, 01 Jun 1995 04:00:00

Hi all,

I have a new problem!

EISA i486 machine. DPT SCSI 2122 controller with 4 MB cache and RAID 1 module.
SCSI Wangtek 5250ES (or something like this) tape streamer.

The streamer can write to tape (with tar and with cpio), but it cannot
READ from tape (neither with tar nor with cpio)!!
Each time I try to read, the whole system hangs!! The only solution is then
to reset it!!

The controller don't seem to have any problems with the hard disks. So I
suppose the problem isn't with the controller, but then where?? Maybe on
the streamer hardware??

Any hints would be appreciated. Thanx, victor.


Fachhochschule Augsburg    phone:  +49 821 486 30 52   (home)
Germany                    phone:  +49 821 888 001     (work)


1. Problem: Wangtek streamer and Future Domain SCSI controller


I do have serious problems accessing my Wangtek 5150ES SCSI-
Streamer using Linux 99pl12.

Read and write operations are not possible.
Some commands such as "mt status" work, but "mt weof" for example
fails. The streamer starts operating and I get the following
message: "I/O error" - followed by endless "scsi0: unexpected interrupt"

Tyring to write data on tapes using "tar" I get:
"only wrote 2048 of .... byte, I/O error writing filemark"
with endless "scsi0: unexpected interrupt" messages again.

My configuration is as follows:

scsi0 : FD TMC-950 at irq 5 address 000CA000 options : ARBITRATE SLOW_HANDSHAKE FAST32
scsi : 1 hosts.
  Vendor: WANGTEK   Model: 5150ES SCSI FA23  Rev: 08  
  Type:   Sequential-Access                  ANSI SCSI revision: 01
Detected scsi tape st0 at scsi0, id 0, lun 0
scsi : detected 1 tape total.

There are no other SCSI-Devices. The streamer is operating just
fine under MS-DOS. The address area used by the TMC-950 controller
is not used for shadowing stuff.

I set ST_BUFFER_BLOCKS to 4 in file st.c and
ST_WRITE_THRESHOLD_BLOCKS is also set to 4, but the
defaults didn't work either.

Please help
Jan - thanks in advance


  Jan Richert, Krefeld, FRG    | Datex-J:    02151399843-0001
-------------------------------+ Data:       +49 2151 396479 (12-20h MET)
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