topic dd to remote tape drive in Operating System - HP-UX

dd to remote tape drive

yc_2 — Wed, 13 Sep 2000 07:50:52 GMT

Hi

How can I dd to a remote tape drive ?

Thanks in advance,
YC

Re: dd to remote tape drive

Andy Monks — Wed, 13 Sep 2000 07:53:34 GMT

dd if= bs=64k | remsh dd of=/dev/rmt/0m bs=64k

That should be it, as long as you can remsh ok.

Re: dd to remote tape drive

Alex Glennie — Wed, 13 Sep 2000 07:55:23 GMT

Notes for the following examples:

Everything under the /relative_path is backed up. If the relative path is /, you
will be doing a full backup.
/tmp/index is an index file of the backup; it can be omitted as can the
verbose -v option.
In order for remsh(1) to work without asking you for a password, either a
.rlogin in the user's home directory on the remote machine or
/etc/hosts.equiv must be properly set up.

Backing up to a tape drive on a remote machine:

Commands to run on the local machine, (the machine without the dds tape drive.

# cd /relative_path
# find . -depth -xdev | cpio -ovxcB 2>/tmp/index |
remsh machinewithDDSdrive -l user "cat - | dd
of=/dev/rmt/0m obs=5k"

To backup across the network on the system that owns the dds tape drive:

# remsh machinetobackup -l user "cd /relative_path ;
find . -depth -xdev | cpio -ovxcB 2>/tmp/index" |
cat - | dd of=/dev/rmt/0m bs=5k

Note: cpio via the network does not support multiple tapes.

Re: dd to remote tape drive

yc_2 — Wed, 13 Sep 2000 08:11:39 GMT

Hi Andy and Alex,

thanks for your advise, really appreaciate your prompt reply.

Hi Andy,

If the "if" is from remote, can you correct me the following should work:

remsh dd if= bs=64k | dd of=/dev/rmt/0m bs=64k

YC

Re: dd to remote tape drive

Stefan Farrelly — Wed, 13 Sep 2000 08:18:13 GMT

Theres 2 ways to do this, 1 is a `push`, ie from the server you want to backup but to a tape driver on a remote server;
dd if= bs=64k | remsh dd of=/dev/rmt/0m bs=64k

OR a `pull`, where you are logged onto the server where the tape drive is located, but want to write to it data from a remote server;
remsh dd if= bs=64k | dd of=/dev/rmt/0m bs=64k