topic Re: Change device file in Operating System - HP-UX

Change device file

jhuihuihi — Mon, 14 Jul 2003 06:35:11 GMT

Dear all,

I want to change device file my tape from /dev/rmt/1m to be /dev/rmt/1m.
What should i do ?

thanks for your help

BR,

Sam

Re: Change device file

Massimo Bianchi — Mon, 14 Jul 2003 06:48:01 GMT

Hi,
we need a little more information...

1)
from /dev/rmt/1m to be /dev/rmt/1m

looks identical :9

2)
in which application ? Omniback ? fbackup ? tar ?

tar: tar .... -f your_device_file

fbackup: fbackup .... -f your_device_file

omniback: modify device properties and write whatever you want...

HTH,
Massimo

Re: Change device file

jhuihuihi — Mon, 14 Jul 2003 06:52:56 GMT

Sorry give you wrong information.

I want to change tape devive file in HP-UX from /dev/rmt/1m to /dev/rmt/0m.

Thanks for your reply

Re: Change device file

twang — Mon, 14 Jul 2003 07:03:52 GMT

If you want to access the tape drive using another name, you may try to create a link:
# ln -s /dev/rmt/0m /dev/rmt/1m

Hope this helps.

Re: Change device file

Tom Geudens — Mon, 14 Jul 2003 07:08:05 GMT

Hi,
Not wanting to be difficult here, but why would you want to do that ? There is no device linked to /dev/rmt/0m any more (but there was probably, otherwise you wouldn't have a /dev/rmt/1m) ?

Note that it is not a simple procedure to change this. What you need is the "ioinit" command. Read the manpages carefully !!!

Regards,
Tom Geudens

P.S. If you want tapedrives to have the same name in your applications, use symbolic links. The following is from our systems :
lrwxr-xr-x 1 root sys 13 Apr 12 2002 /dev/robotwilg_drv0 -> /dev/rmt/5mnb
lrwxr-xr-x 1 root sys 14 May 2 2002 /dev/robotwilg_drv1 -> /dev/rmt/10mnb
lrwxr-xr-x 1 root sys 13 Apr 12 2002 /dev/robotwilg_drv3 -> /dev/rmt/4mnb

Whatever the device is, the application always uses robotwilg_drv0,drv1 or drv3.

Re: Change device file

Massimo Bianchi — Mon, 14 Jul 2003 07:11:21 GMT

Hi,
i agree with others comments.
Not for doing your businness, but why do you want to do so ?

if, from "ioscan -fnCtape", you have just tape 1m, then you must use it.

If there are script that uses the 0m, then you must change them, and not the system.

HTH,
Massimo

Re: Change device file

twang — Mon, 14 Jul 2003 07:48:13 GMT

Take a look at this thread:
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x195428c64656d71190080090279cd0f9,00.html

Hope it helps.

Re: Change device file

Pete Randall — Mon, 14 Jul 2003 09:12:58 GMT

Sam,

The procedure is outlined in this thread:

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x5cb97680e012d71190050090279cd0f9,00.html

Pete

Re: Change device file

Tim Sanko — Mon, 14 Jul 2003 11:27:35 GMT

If you need to really change this for massive script changes. (for a system with one tape drive I have difficulty imagining this being something an awk script can't handle.

I would replace my ioconfig file, however, it would be much easier to replace my /dev/rmt/0m in scripts with sed or awk...

Tim

Re: Change device file

Caesar_3 — Mon, 14 Jul 2003 19:46:32 GMT

Hello!

Just create link to the device and that's all
what you need.

Caesar

Re: Change device file

blal — Tue, 15 Jul 2003 12:47:18 GMT

Hi,

One more thing what you can do is ,if the dat drive is the only device connected in your SCSI controller you can delete the existing device file using rmsf and change the SCSI id of the DAT drive to 0 and reboot the server.The new device file will be /dev/rmt/0m.

Other wise just create a create a link using

#ln /dev/rmt/0m /dev/rmt/1m.

Now both device file will point to save drive .

Regards
baiju