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Full Discussion: Unix 10.2 Backup Problem
Top Forums UNIX for Dummies Questions & Answers Unix 10.2 Backup Problem Post 302162624 by vbe on Tuesday 29th of January 2008 01:08:14 PM
Old 01-29-2008
Not sure what to advise you (english isnt my language so forgive my mistakes...)
- backup isnt what we can call a standard command, I suppose you will see by typing file <path>backup as a script... and so I dont know what it does exactly...

- I suppose to go through as I would with such issue:
Get a tape head cleaner and have a go at cleaning the device
Prepare a new tape and insert it in the device

I dont know what commands are on a B class (worksation serie 700) I know only 800 (servers) but if you have fbackup/frecover command I would do a man and try to use these commands
Also tapes depending of which device was used DO NOT rewind after... and this may be why you cannot restore

I would do an ioscan -funC tape and it should display something like:
/sm/doc # ioscan -funC tape
Class I H/W Path Driver S/W State H/W Type Description
=====================================================================
tape 0 8/16/5.0.0 stape CLAIMED DEVICE HP C1533A
/dev/rmt/0m /dev/rmt/c1t0d0BEST
/dev/rmt/0mb /dev/rmt/c1t0d0BESTb
/dev/rmt/0mn /dev/rmt/c1t0d0BESTn
/dev/rmt/0mnb /dev/rmt/c1t0d0BESTnb
You should have your device on /dev/rmt/XmY
X=0,1,2,3...
Y= <blank>, b, n, nb
the meaning of Y is b for best n for no rewind
the idea is once we know what device to use, lets say /dev/rmt/1m
we use the no rewind device in order to use the mt command
once ready lets see if the tape is at the beginning:
mt -t /dev/rmt/1mn rew
# What is the result? (is it rewinding? proving you were at the end of writing explaining why it had nothing the restore?)
mt -t /dev/rmt/1mn offl to after, eject the tape.
 

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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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