topic tar network data in Operating System - HP-UX

tar network data

j773303 — Wed, 06 Aug 2003 00:24:02 GMT

How do backup host A /data/* to host B tape drive by use tar command?
Assume B has connect a TAPE drive.

Re: tar network data

Steven E. Protter — Wed, 06 Aug 2003 00:27:59 GMT

1) You can't write directly to the tape drive on host B.

Few ways to get the data over there.

If host be is running nfs, you can mount a folder where you'd have read/write capabilities. Lets call it /tmp/tar

mount hostb://tmp/tar /hostb

A folder in root named /hostb must exist.

then

tar xvf /hostb/file.tar *

Alternative:

tar xvf /tmp/file.tar

scp -p /tmp/file.tar hostb://tmp/tar

rcp will also work if you are using it.
scp requires Secure Shell and public keys exchanged to work without a password change.

Let me know if you need more detail.

SEP

Re: tar network data

Steven E. Protter — Wed, 06 Aug 2003 00:28:40 GMT

Note corrections to my original post.

1) You can't write directly to the tape drive on host B.

Few ways to get the data over there.

If host be is running nfs, you can mount a folder where you'd have read/write capabilities. Lets call it /tmp/tar

mount hostb://tmp/tar /hostb

A folder in root named /hostb must exist.

then

tar cvf /hostb/file.tar *

Alternative:

tar cvf /tmp/file.tar

scp -p /tmp/file.tar hostb://tmp/tar

rcp will also work if you are using it.
scp requires Secure Shell and public keys exchanged to work without a password change.

Let me know if you need more detail.

SEP

Apologies for the pea brain molecule(brain) freeze.

Re: tar network data

Michael Tully — Wed, 06 Aug 2003 00:33:15 GMT

Try these:

# tar cvf - /data/* | remsh hostname dd of=/dev/rmt/0m

or

# cd /data
# tar cvf - . | remsh hostname dd of=/dev/rmt/0m

which will backup the current directory.

or

# remsh hostname "dd if=/dev/rmt/0m bs=10k" | tar xvf -

'hostname' is the hostname of the machine with the tape drive.

Re: tar network data

malay boy — Wed, 06 Aug 2003 00:33:45 GMT

Hi ,
fbackup allow you to do a this kind of backup.

Here are the bit of man pages on fbackup option -f :

There is slightly different behavior if remote devices
are used. A device on the remote machine can be
specified in the form machine:device. fbackup creates
a server process from /usr/sbin/rmt on the remote
machine to access the tape device. If /usr/sbin/rmt
does not exist on the remote system, fbackup creates a
server process from /etc/rmt on the remote machine to
access the tape device. Only magnetic tapes can be
remote devices. When remote DDS tape devices are used,
the fast search marks capability is not used.

I done it a couple of years ago and if i was not mistaken you need to setup the rhost only.
If my pee-wee brain remember correctly.

Hope this help.

regards
mB