Very Computer

All,

I have come across a strange problem. The cpio utility is used to
archive data to tapes. This usually worked well until recently. Now,
every time the process starts writing to the third tape I get an error
'cpio: cannot open "/dev/rmt/0cn", errno 16, device busy'. Please note
that there are files with sizes greater than 8 GB to be archived. I have
been told that the '-H odc' option would overcome the limitation of cpio
with files greater than 8 GB. I also have been told that the '-c' & '-H
odc' options are mutually exclusive and should not be used together. I
notice however that I get no error even though that may be so. Any
comment on this?

The command used is shown below.

cat ${BKUPF} | cpio -ocvB -H odc -O ${BKDEV} -M "Insert Tape %d and
Press
[ENTER]"

The variable ${BKUPF} expands to a fully qualified filename containing
the
list of files to be backed up.  And ${BKDEV} expands to /dev/rmt/0cn.

Thanks.

Quote:>All,

>I have come across a strange problem. The cpio utility is used to
>archive data to tapes. This usually worked well until recently. Now,
>every time the process starts writing to the third tape I get an error
>'cpio: cannot open "/dev/rmt/0cn", errno 16, device busy'. Please note
>that there are files with sizes greater than 8 GB to be archived. I have
>been told that the '-H odc' option would overcome the limitation of cpio
>with files greater than 8 GB. I also have been told that the '-c' & '-H
>odc' options are mutually exclusive and should not be used together. I
>notice however that I get no error even though that may be so. Any
>comment on this?

Cpio cannot ever handle more than 8 GB. This is the reason why it has
been withdrawn from the POSIX standard!

If you like to archive files > 8 GB in a standard conforming archive format
you need to use star

ftp://ftp.fokus.gmd.de/pub/unix/star

It supports the new POSIX.1-2001 TAR format.

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