07-25-2008
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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LEARN ABOUT SUNOS
device_maps
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)