topic Re: view make_recovery tape contents in Operating System - HP-UX

view make_recovery tape contents

Sammy_2 — Tue, 28 Aug 2001 17:24:21 GMT

Trying to look the contents of make_recovery dds3-tape and recover just one file. The make_recovery tape was made using the following command.
# /opt/ignite/bin/make_recovery -A -C -v -d /dev/rmt/0mn
and was successful.

Tried this and get the following errors:
# mt -f /dev/rmt/0mn fsf 1
fsf 1 failed: I/O error
# mt -t /dev/rmt/0mn fsr 1
fsr 1 failed: I/O error

Re: view make_recovery tape contents

harry d brown jr — Tue, 28 Aug 2001 17:27:27 GMT

You need to rewind the tape first after the make_recovery to the no-rewind device: /dev/rmt/0mn

If the tape was just loaded prior to you performing the make_recovery, then you can rewind the tape using :

mt -t /dev/rmt/0m rew

Re: view make_recovery tape contents

Sridhar Bhaskarla — Tue, 28 Aug 2001 17:31:19 GMT

if mt -t /dev/rmt/0mn fsf 1 fails,

then probably the tape is corrupted. Try doing the following to confirm that the tape is really bad.

/opt/ignite/bin/copy_boot_tape -u /dev/rmt/0mn -b -d to_somewhere

It should successfully dump the bootimage under
to_somehwere directory. Else, the tape is confirmed bad.

You can also user check_recovery command to verify if everything is ok.

-Sri

Re: view make_recovery tape contents

Michael Roberts_3 — Tue, 28 Aug 2001 17:34:03 GMT

This has worked for me in the past:

mt -t /dev/rmt/0m rew
mt -t /dev/rmt/0mn fsf #no count default is 1

# get table of contents
pax -vf /dev/rmt/0mn

Re: view make_recovery tape contents

James R. Ferguson — Tue, 28 Aug 2001 17:36:38 GMT

Hi Sam:

The following should work on a rewound tape (or one freshly inserted into the drive):

# mt -t /dev/rmt/0mn fsf 1
# tar -xvf /dev/rmt/0m filename

Note that the first command forward spaces ONE FILE without rewind. The second command extracts one file.

The 'mt -t' is equivalent to 'mt -f' as of 11.x and is the preferred form.

...JRF...

Re: view make_recovery tape contents

Sammy_2 — Tue, 28 Aug 2001 17:58:33 GMT

Thanks to everyone. I had to rewind b4 issuing the command "mt -t /dev/rmt/0mn fsr 1"
command.
I had to do:
# mt -t /dev/rmt/0m rew
Harry, Sridhar, Michael and James were right and pointed me in the right direction.
Appreciate it. Solved.

Re: view make_recovery tape contents

Magdi KAMAL — Wed, 29 Aug 2001 07:55:11 GMT

Hi Sam,

#mt -t /dev/rmt/0m rew
Will rewind the tape.

#mt -t /dev/rmt/0mn fsf #1
Will skip the lif area.

#tar -xvf /dev/rmt/0m home/abc/myFile.sh

Attention:
The recovered file is in RELATIVE path ( without the slash in the begining. In my example the home directory is without the slash in the begining ).

Only two files are in ABSOLUTE path :
/etc/passwd
/etc/group

Magdi