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Top Forums UNIX for Dummies Questions & Answers HP Unix 10.20 DDS Tape Driver Corruption Post 302218412 by stufftiger on Friday 25th of July 2008 04:33:33 AM
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
 

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device_maps(4)							   File Formats 						    device_maps(4)

NAME
device_maps - device_maps file SYNOPSIS
/etc/security/device_maps DESCRIPTION
The device_maps file contains access control information about each physical device. Each device is represented by a one line entry of the form: device-name : device-type : device-list : where device-name This is an arbitrary ASCII string naming the physical device. This field contains no embedded white space or non- printable characters. device-type This is an arbitrary ASCII string naming the generic device type. This field identifies and groups together devices of like type. This field contains no embedded white space or non-printable characters. device-list This is a list of the device special files associated with the physical device. This field contains valid device special file path names separated by white space. The device_maps file is an ASCII file that resides in the /etc/security directory. Lines in device_maps can end with a `' to continue an entry on the next line. Comments may also be included. A `#' makes a comment of all further text until the next NEWLINE not immediately preceded by a `'. Leading and trailing blanks are allowed in any of the fields. The device_maps file must be created by the system administrator before device allocation is enabled. This file is owned by root, with a group of sys, and a mode of 0644. EXAMPLES
Example 1: A sample device_maps file # scsi tape st1: rmt: /dev/rst21 /dev/nrst21 /dev/rst5 /dev/nrst5 /dev/rst13 /dev/nrst13 /dev/rst29 /dev/nrst29 /dev/rmt/1l /dev/rmt/1m /dev/rmt/1 /dev/rmt/1h /dev/rmt/1u /dev/rmt/1ln /dev/rmt/1mn /dev/rmt/1n /dev/rmt/1hn /dev/rmt/1un /dev/rmt/1b /dev/rmt/1bn: FILES
/etc/security/device_maps SEE ALSO
allocate(1), bsmconv(1M), deallocate(1), dminfo(1M), list_devices(1) NOTES
The functionality described in this man page is available only if the Basic Security Module (BSM) has been enabled. See bsmconv(1M) for more information. SunOS 5.10 16 Jan 2001 device_maps(4)
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