topic load-command with Dat-Exchanger in Operating System - HP-UX

load-command with Dat-Exchanger

Thomas Greig — Wed, 05 Nov 2003 04:39:21 GMT

HP-UX 11i

we have a couple of hp DAT-exchangers, and I was wondering if there's a command I can type to insert/load the tape?

One can ofcourse do this manually, but I would like to be able to do it through the command-line too. sometimes the tape is not loaded, or say I need tape 6 and tape1 is loaded I will have to go through all the tapes before I get to the tape I need.

I'm sure there's a "quick" solution for this.

cheers
Thomas G.

Re: load-command with Dat-Exchanger

Thayanidhi — Wed, 05 Nov 2003 05:17:45 GMT

Hi,

Use "mc" Command.

See the man page for "mc"

If you are using HP's Omniback,
then there are some sommand line utilitis.

TT

Re: load-command with Dat-Exchanger

Elmar P. Kolkman — Wed, 05 Nov 2003 05:32:12 GMT

For this you will need a /dev entry for the changer. This device is something you will need to create yourself with mknod. On 11i it will be something like:
mknod /dev/datchgr c 203 0xcs0000
where:
c=controler number
s=SCSI ID of changer

If you have this, you can use:
mc -p /dev/datchgr [...]

Re: load-command with Dat-Exchanger

Thomas Greig — Wed, 05 Nov 2003 06:24:00 GMT

I have already created "nod's" with the mknod-comamnd. the address to that is
/dev/rmt/dat

Â¤ll /dev/rmt/dat
crw-rw-rw- 1 bin bin 205 0x0030c0 ... /dev/rmt/dat

Even as I do it as root, I get a Permission-error when I try to run the mc-command:

#mc -p /dev/rmt/dat -r DS
ERROR: Permission denied

#mc -p /dev/rmt/dat -s S2 -d D1
ERROR: Permission denied

#mc -p /dev/rmt/dat -c DS
ERROR: Permission denied

Thom

Re: load-command with Dat-Exchanger

Elmar P. Kolkman — Wed, 05 Nov 2003 07:15:17 GMT

Your node is not for the changer but for a tape unit... You need the changer to have its own device node.

Check out the major number you used (205) with lsdev and you'll see it is using the stape driver instead of a spt or sctl driver, which is needed for the changer to work.

Re: load-command with Dat-Exchanger

Thomas Greig — Wed, 05 Nov 2003 08:19:01 GMT

thank you very much!..this is now working perfect. the node for the exchanger was created for omniback.. but after creating a node for the tapedrive too it's working as a dream.

cheers
Thomas

Re: load-command with Dat-Exchanger

Thomas Greig — Wed, 26 Nov 2003 08:01:27 GMT

one last question: is it possible to tell the 'mc' to return the tape from it's original slot?..

say we insert the third tape (out of six) into the drive, -when this tape is beeing ejected, we want it to return to slot 3.

If this is possible it's much easier to make a alias/script for this.

cheers
Thomas Greig