topic Re: Problem with TAR in Operating System - HP-UX

Problem with TAR

DK Raviraja — Mon, 19 Feb 2001 11:30:23 GMT

Hello

I have a DLT 40/80 Tape. I wanted to restore thae content through remote machine. ( I dnt have DLT drive in the system where I wnat t restore). I used followng command
rsh i3sn03 dd if=/dev/rmt/2b | tar -xvf -

read: Not enough space
0+0 records in
0+0 records out

where i3sn03 is tha m/c where DAT drive is attched.

I always get not enough memory Why.

I added 1G swap but it gave same error
DLT has about 25G data. My Mount point has 35G fre space.

Can anybody help me

DKR

Re: Problem with TAR

Dan Hetzel — Mon, 19 Feb 2001 11:39:14 GMT

Hi,

The command should work if you use 'remsh' as in:
remsh i3sn03 -n "dd if=/dev/rmt/2b" | tar -xvf -

Best regards,

Dan

Re: Problem with TAR

DK Raviraja — Mon, 19 Feb 2001 11:45:14 GMT

No Luck Friend !

DKR

Re: Problem with TAR

Mike Williams_3 — Mon, 19 Feb 2001 11:51:06 GMT

Have you confirmed you can run a trivial command on the remote system? eg remsh hostname ls

If that doesn't work try looking at ~/.rhosts

If that works you might try GNU tar which has remote tarring via rmt. You would need to install on both systems and make sure you have it in the PATH first.

In my experience remote tarring is always a bit suspect. Have you thought of remote mounting the target via NFS?

Re: Problem with TAR

Dan Hetzel — Mon, 19 Feb 2001 12:00:42 GMT

Hi,

Providing remote commands work (.rhosts files OK), try the following:

remsh i3sn03 -n "dd if=/dev/rmt/2b bs=10K" | tar -xvf -

Dan

Re: Problem with TAR

Shannon Petry — Mon, 19 Feb 2001 14:16:41 GMT

I have a interactive script I wrote for users to use any tape device on the network. It simply uses
> /usr/bin/remsh $HOST '/usr/bin/dd -if=/dev/rmt/c?t?d? bs=512b | /usr/bin/tar xvf -'

The problem in HP-UX is "rsh" is restricted shell, and will not work.

Depending on the topology of the network, you could try to add a "-n" to the remsh command.

> /path/remsh -n $HOST 'dd ...'

man remsh should give more.

As long as you can make the TCP/IP connection to the host, there should be no problem with this.

Regards,
Shannon

Re: Problem with TAR

Carlos Fernandez Riera — Mon, 19 Feb 2001 15:24:48 GMT

I agre DAN.

remsh i3sn03 -n "dd if=/dev/rmt/2b ibs=10K" | tar -xvf -

may run
_____

No points for me , thank you.