extracting files from an Ignite NETWORK archive

[Peter Heinemann]

I know how to extract from a tape, but how about from the on-disk network archive? I notice that the network archive files are a gzip compressed...
...thanks.

[Steven E. Protter]

If the file is gzip compressed. You should be able to use gunzip to extract files from the archive. You may also need to use pax.

If you look at the log that created the archive you'll see exactly what tools were used to product it.

SEP

[Cheryl Griffin · Accepted solution]

# cd /var/opt/ignite/recovery/archives/hostname
# ls (ls to get the archive name)
# gzcat ./archive_name | pax -r -f - etc/copyright

Note: there is no leading slash in front of the filename you are attempting to restore.

[John P. Kole]

Please note that if your archive is larger than 2gb you will not be able to use gunzip or gzcat directly:

$ ls -al OSarch.gz
-rw-rw-rw- 1 root sys 2278914411 Oct 11 16:26 OSarch.gz
$ gunzip -c OSarch.gz | tar -tvf -
OSarch.gz: Unknown error
Tar: blocksize = 0; broken pipe?
$ gzcat OSarch.gz | tar -tvf -
OSarch.gz: Unknown error
Tar: blocksize = 0; broken pipe?


Instead, you should use gunzip or gzcat in a pipe (which should work for all archives):
$ cat OSarch.gz | gzcat | tar -tvf - | head
rwxr-xr-x 0/0 0 Oct 11 15:51 2004 ./
rwxr-xr-x 0/0 0 Oct 5 09:36 2004 lost+found/
r-xr-xr-x 2/2 0 Oct 11 15:51 2004 etc/
r--r--r-- 2/2 184 Mar 26 01:00 2004 etc/group
r--r--r-- 0/1 595 Oct 5 10:23 2004 etc/passwd


More details on this subject can be found at:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=713940

[Peter Heinemann]

True for tar, but note that Cheryl's reply used pax which resolves the problem.

[Peter Heinemann]

Current replies provide solution.