topic Creating a special device file....? in Operating System - HP-UX

Creating a special device file....?

Lucien Wolfs — Fri, 22 Mar 2002 09:37:55 GMT

Hi,

A new robotics tapedevice is added. With ioscan -f I see:
unknown -1 0/0/12/0/0.9.26.255.14.8.0 UNCLAIMED UNKNOWN STK L700

Now I should be able to create a special devicefile. Can anybody tell me HOW I can do this.

Thanks !

Re: Creating a special device file....?

Carlos Fernandez Riera — Fri, 22 Mar 2002 09:45:43 GMT

UNCLAIMED and UNKNOWN say that you need to include a new driver into your kernel.

I think it is stape, but noy sure.

Re: Creating a special device file....?

steven Burgess_2 — Fri, 22 Mar 2002 10:09:11 GMT

Hi

here's a note i sent to one of our guys regarding creating device files

The tape devices need to be character device files

to make these use the mknod command

The major and minor numbers can generally be copied by looking at the other device files on that system
or another system

For _6 I looked at the device files are 1m etc and the target file, ie

crw-rw-rw- 2 bin bin 205 0x011000 Apr 26 2000 c1t1d0BEST
crw-rw-rw- 2 bin bin 205 0x011080 Apr 26 2000 c1t1d0BESTb
crw-rw-rw- 2 bin bin 205 0x011040 Apr 26 2000 c1t1d0BESTn
crw-rw-rw- 2 bin bin 205 0x0110c0 Apr 26 2000 c1t1d0BESTnb

You can see at the beginning of the file there is a 'c' for character device

The major number (device driver used by the kernel is 205, the minor number is 0x011000

I saw that the device files for 1m were the same for the targets for 1m ie

crw-rw-rw- 2 bin bin 205 0x011000 Apr 26 2000 1m

crw-rw-rw- 2 bin bin 205 0x011000 Apr 26 2000 c1t1d0BEST

The minor numbers were the same

I then re created the device files for 0m etc using the following

mknod /dev/rmt/0m c 205 0x010000
mknod /dev/rmt/0mb c 205 0x010080
mknod /dev/rmt/0mn c 205 0x010040
mknod /dev/rmt/0mnb c 205 0x0100c0

You can then read the tape header

Hope this info is ok

Regards

Steve

Re: Creating a special device file....?

Clemens van Everdingen — Fri, 22 Mar 2002 10:14:02 GMT

Hi,

You still have to put stape and schgr driver in the kernel.
Normally if the correct drivers are in the kernel you have to run ioscan and maybe insf to create the special files.

C.

Re: Creating a special device file....?

Lucien Wolfs — Fri, 22 Mar 2002 10:25:48 GMT

The stape driver is loaded, the schgr driver not. Is this the only driver needed ?
(Reboot is difficult: not the command, but the users !)

Re: Creating a special device file....?

Clemens van Everdingen — Fri, 22 Mar 2002 10:44:14 GMT

Hi,

I think it's the only extra driver needed but I will check a bit more.

C.

Re: Creating a special device file....?

Clemens van Everdingen — Fri, 22 Mar 2002 10:50:56 GMT

Hi,

For some more information see different manuals.
http://www.hp.com/cposupport/manindex/hpsurestor19258_eng_man.html
Especially tape library configuration.
As I read sctl driver is needed as well.

C.

Re: Creating a special device file....?

Steven Gillard_2 — Fri, 22 Mar 2002 10:53:51 GMT

Have a look at the following document:

http://europe-support2.external.hp.com/cki/bin/doc.pl/sid=e9e6411f07aa729de6/screen=ckiDisplayDocument?docId=200000059736919

It depends on your hardware type - there are a couple of options.

Regards,
Steve

Re: Creating a special device file....?

Lucien Wolfs — Fri, 22 Mar 2002 10:57:36 GMT

Thanks,

I'll reboot the system enabling the SCHGR driver.