HP Unix 10.20 DDS Tape Driver Corruption


 
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# 1  
Old 07-25-2008
Bug HP Unix 10.20 DDS Tape Driver Corruption

Dear Experts and Advanced User,

I encounter a rare problem as mentioned above. I am not able to read the tape cartridge using the following command:

#dd if=/dev/rmt/0mnb ibs=16k | tar tvf -

It will prompt me with the message saying DD I/O error, broken pipe; everytime the above command is enter.

However, it still support

#mt offl
#mt rew

By using sam, under the tape drive section, the physical hardware is listed. But, when I go to device files, it shown as following:

/dev/rmt/0mb berkeley unkown density "TYPE_DEPENDENT1"

/dev/rmt/0mnb berkeley no rewind unkown density "TYPE_DEPENDENT"

The tape drive and tape cartridge BOTH are in good condition. Both items can be use in different machine with the same OS.

Appreciate if anyone could provide me some solution or useful tips?

Thank you
# 2  
Old 07-25-2008
Curious. Why are you forcing ibs=16k? Was the tape written that way?
Do the mt commands work when you specify the device name?
mt -t /dev/rmt/0mb offl
Been a long time for HPUX so the -t switch may be wrong.
What does "tar tv" do?
How about tar tvf /dev/rmt/0mnb?
 
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