problem restoring files from CPIO

[Tony Kuehn]

Hi,
I have a DLT tape that has a CPIO archive on it that was created on a AIX machine. I need to recover a few of the files, however, I don't have a AIX machine (yet) to recover to. The problem is that the CPIO command used to write the files uses an option specific to AIX that is not available to HPUX. Here is the command that is used to create the archive:
find $directory -print | cpio -C300ov > $Tape

On HPUX, I cannot find an equivalent option for the -C. I have tried using PAX to restore the files and I am able to get the first file (or part of it from tape) and then I get a message to enter the second volume. Here is the pax command that I am using:
pax -r -x cpio -b 300 -f $tape -v '/string/'

I have tried using the no-rewind device file for the tape and then using mt -t fsf 1 to move the tape forward one file and tried the pax command again but that gives me the following error message:
pax: [offset 0g+0m+0k+0]: I/O error

Please advise, any help/suggestions you may have to get the other files recovered from the tape, cpio, pax, or other.

Thank you!
Tony

[Steven E. Protter]

I don't see how pax is going to recover files written by AIX cpio.

You must use cpio.

I don't update cpio very often. You may find the feature you need in the latest patch that includes cpio or from a version at the software archive site.

http://hpux.connect.org.uk/hppd/hpux/Gnu/cpio-2.5/

http://www2.itrc.hp.com/service/patch/patchDetail.do?BC=patch.breadcrumb.main|patch.breadcrumb.search|&patchid=PHCO_24440&context=hpux:800:11:11

SEP

[H.Merijn Brand (procura · Accepted solution]

I have both :)

# dd if=/dev/rmt/0m ibs=10240k | cpio -ivdm

-Cblocks is the alternative for -B

GNU cpio supports both, which makes it the best bet for you

Most recent cpio (less than two weeks) were uploaded to my site:

http://mirrors.develooper.com/hpux/#Downloads
10.20: http://mirrors.develooper.com/hpux/cpio-2.6-pa1.1
11.00: http://mirrors.develooper.com/hpux/cpio-2.6-pa2.0
11.11: http://mirrors.develooper.com/hpux/cpio-2.6-elf64

Enjoy, Have FUN! H.Merijn

[Etienne Roseau]

hi, on HPUX version of cpio, the line command to restore files from a tape is :
cpio -icvdBmu < /dev/rmt/Xm
to exec in the dir where you want the files to be restored
HTH
E.
ps happy new year 'verybody

[H.Merijn Brand (procura]

Etienne, that is a very dangerous combination of options for a tape coming from another system!

-u = UNCONDITIONALY

cpio allows absolute pathnames, what if I gave you this archive, created on a trusted AIX system?

# echo /etc/passwd | cpio -ocvB >/dev/rmt0

Do you think your HP-UX system will still work after extractiong the tape? I bet next time you will think again ...


Enjoy, Have (safe) FUN! H.merijn

[Tony Kuehn]

Thank you for your replies. I tried the CPIO command that was suggested by Procura and that is working! Thank you all for your assistance.

Tony

[Tony Kuehn]

Thanks again for all the replies.