/dev/rmt/0m 1m 2m tape drive woes

[Chris Fadrowski]

my scenerio;

i use a DDS 3 drive between 3 different servers. Sometimes the tape device comes up as /dev/rmt/2m instead of /dev/rmt/0m. this causes me problems because "tar" will always default to 0m even if you tell it 2m. i am also doing my make_recovery's to /dev/rmt/1mn. will this be a problem there?

[Pete Randall]

Chris,

You can simply rename the device file to be whatever you want.

mv /dev/rmt/2m /dev/rmt/0m


Pete

[James R. Ferguson · Accepted solution]

Hi Chris:

While '/dev/rmt/0m' is the default device for 'tar' you can specify '-f ' to use an alternate device.

Similarly, with 'make_tape_recovery' use the '-a' switch and the appropriate argument, for example:

# make_tape_recovery -x inc_entire=vg00 -I -v -a /dev/rmt/2mn

Regards!

...JRF...

[OldSchool]

"tar" should go where you tell it! as in "tar -cvf /dev/rmt/2m...."

I've not had issues w/ ignite, and I use 0mn, 1mn, and 2mn routinely, depending upon server.

So why are the drive device files changing? Device phyically disconnected? Reboot? Are you physically moving the drive or cabling between servers?

[sachit patil]

hello
pls install drivers for tape drive
#insf -e
or don't change the cable id when u attching that drive to server .
see that installed driver using
#ioscan -fnc tape
It will show the device files for that tape.
regards

[Chris Fadrowski]

i wasn't throwing it the f option and kept defaulting to 0m

so this won't affect my make_recovery's and i shouldn't really worry what device 0mn 1mn or 2mn shows up right?

[James R. Ferguson]

Hi (again) Chris:

You wrote, "so this won't affect my make_recovery's and i shouldn't really worry what device 0mn 1mn or 2mn shows up right?"

That is correct. Use the '-a /dev/rmt/2mn' (or whatever) to specify the proper tape device for your 'make_tape_recovery'.

Regards!

...JRF...

[Pete Randall]

Any command that I can think of has an option to specify the device, be it make_tape_recovery or tar or fbackup or whatever, so no you shouldn't have to worry about. Also, as I said, you can simply rename the device files or even re-create them with any name you choose.


Pete