topic Re: Reading tar archive from Ignite tape fails with checksum error in Operating System - HP-UX

Reading tar archive from Ignite tape fails with checksum error

Paul F. Bennett — Mon, 02 Mar 2009 20:27:35 GMT

I’m attempting to create an Ignite make_recovery_tape from an Ignite Network Archive. I follow the exact step outlined by several docs I have found, in which they all pretty much give the same steps. Everything appears to run find until I try to read the tar’d archive.

I create the LIF header on the tape:
# /usr/bin/dd if=/var/tmp/my_lif of=/dev/rmt/c4t1d0DDS1n obs=2k

I tar the archive to the tape:
# /usr/bin/dd if=/var/opt/ignite/recovery/archives/ftuxtest/2009-02-27,02:13 of=/dev/rmt/c4t1d0DDS1n obs=10k

But when I attempt the read the tar archive is get the following error:
# /usr/bin/mt -t /dev/rmt/0mn fsf 1
# /usr/bin/tar tvf /dev/rmt/0m
directory checksum error

Base on the time it takes for the dd to complete it appears the archive is being copied but I cant read it. Below are the steps I take to create the LIF and tar archive before I write to the tape.

I know this is a lot but any thought?

CREATE A BOOTABLE TAPE WITH make_net_recovery:

1. Use make_medialif to build the LIF file:

a. cd /var/opt/ignite/clients/sys1/recovery/1999-03-12,09:00

b. /opt/ignite/bin/make_medialif \
-f system_cfg -f control_cfg -f archive_cfg \
-C "1999-03-12,09:00 sys1 recovery image" \
-l /var/tmp/my_lif \
<-r and -o options>

2. Modify the LIF file to set it up for use on the tape:

/opt/ignite/bin/instl_adm -d -F /var/tmp/my_lif > /var/tmp/cfg

3. Edit the /var/tmp/cfg file and add the following lines to the
end of the file:

control_from_server=FALSE
run_ui=FALSE
env_vars += "INST_ALLOW_WARNINGS=10"

4. Issue this command:

/opt/ignite/bin/instl_adm -F /var/tmp/my_lif -f /var/tmp/cfg

Re: Reading tar archive from Ignite tape fails with checksum error

Steven E. Protter — Mon, 02 Mar 2009 20:44:09 GMT

Shalom,

Interesting idea.

It might work better to do a network recovery to a system with a tape drive and then make the ignite tape.

As far as I know make_net_recovery archives are suitable for network recovery and make_tape_recovery archives are suitable for tape recoveries.

I don't think they can be cross matched.

Its like putting AB blood in an O positive patient.

SEP

Re: Reading tar archive from Ignite tape fails with checksum error

Tingli — Mon, 02 Mar 2009 21:02:06 GMT

I don't see you tar file from /recovery/1999-03-12,09:00 to tape. You just dd there, therefore this is a file of gz over tar. For this, you need to gunzip it first, the tar -x it.

Re: Reading tar archive from Ignite tape fails with checksum error

OldSchool — Mon, 02 Mar 2009 21:36:30 GMT

"You just dd there, therefore this is a file of gz over tar. "

where / how did gzip get in this????

Re: Reading tar archive from Ignite tape fails with checksum error

Tingli — Tue, 03 Mar 2009 04:47:19 GMT

The way to read a ignite file is:

gunzip < /var/opt/ignite/clients/sys1/recovery/1999-03-12,09:00 | tar -tf .

as actually it is a gz file.

Re: Reading tar archive from Ignite tape fails with checksum error

Avinash20 — Tue, 03 Mar 2009 05:37:35 GMT

shivaji@root/>tar -cvf /tmp/avinash.tar avinash
a avinash/var/adm/sw/swagent.log 1 blocks

shivaji@root/>tar -tvf /tmp/avinash.tar
rwxrwxrwx 0/3 0 Feb 16 13:05 2009 avinash/
rwxr-xr-x 0/3 0 Feb 16 13:05 2009 avinash/var/
rwxr-xr-x 0/3 0 Feb 16 13:05 2009 avinash/var/adm/
rwxr-xr-x 0/3 0 Feb 16 13:05 2009 avinash/var/adm/sw/
rw-r--r-- 0/3 234 Feb 16 13:05 2009 avinash/var/adm/sw/swagent.log

shivaji@root/>dd if=/tmp/avinash.tar of=/tmp/avinash_back
20+0 records in
20+0 records out

shivaji@root/>ll /tmp/avinash_back
-rw-rw-rw- 1 root sys 10240 Mar 3 11:02 /tmp/avinash_back

shivaji@root/>file /tmp/avinash_back
/tmp/avinash_back: tar file

shivaji@root/>tar -tvf /tmp/avinash_back
rwxrwxrwx 0/3 0 Feb 16 13:05 2009 avinash/
rwxr-xr-x 0/3 0 Feb 16 13:05 2009 avinash/var/
rwxr-xr-x 0/3 0 Feb 16 13:05 2009 avinash/var/adm/
rwxr-xr-x 0/3 0 Feb 16 13:05 2009 avinash/var/adm/sw/
rw-r--r-- 0/3 234 Feb 16 13:05 2009 avinash/var/adm/sw/swagent.log

### Hence if the format is tar this should be working but for Ignite am not sure.

Check
# file /var/opt/ignite/recovery/archives/ftuxtest/2009-02-27,02:13

## Try achieving small file on the tape and check if you are able to view the file

Re: Reading tar archive from Ignite tape fails with checksum error

OldSchool — Tue, 03 Mar 2009 17:09:16 GMT

hmmm...the following post:
http://forums13.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1236099914384+28353475&threadId=1009153

seems to indicate that network ignites are gzipped, while the tape versions aren't...

if that is correct, you would need to unzip the archive prior to copying it to tape. failure to do so would result in just the error you got.....

Re: Reading tar archive from Ignite tape fails with checksum error

Avinash20 — Tue, 03 Mar 2009 17:26:49 GMT

Check
# file /var/opt/ignite/recovery/archives/ftuxtest/2009-02-27,02:13

Re: Reading tar archive from Ignite tape fails with checksum error

Paul F. Bennett — Tue, 03 Mar 2009 17:29:16 GMT

The file is gzip'd...

Re: Reading tar archive from Ignite tape fails with checksum error

Paul F. Bennett — Tue, 03 Mar 2009 17:31:00 GMT

let me try unzipping the archive prior to copying to tape, thanks all!