tape drive problem HP-UX 11i

[Chang_6]

Hi,
This is the sequence of steps that I use to test a tape drive on an HP-UX 11i machine

1) ioscan -fnC tape
2) rmsf -H 0/12/0/../../..
3) insf -H 0/12/0/../../..

were performed. Verified 4) ioscan -fnC tape and I could see the listing.

# ioscan -fnC tape
Class I H/W Path Driver S/W State H/W Type Description
======================================================================
tape 0 14/0/3.0.0 stape CLAIMED DEVICE HP C5713A
/dev/rmt/0m /dev/rmt/0mnb /dev/rmt/c3t0d0BESTn /dev/rmt/c3t0d0DDSb
/dev/rmt/0mb /dev/rmt/c3t0d0BEST /dev/rmt/c3t0d0BESTnb /dev/rmt/c3t0d0DDSn
/dev/rmt/0mn /dev/rmt/c3t0d0BESTb /dev/rmt/c3t0d0DDS /dev/rmt/c3t0d0DDSnb

However, I issued tar cf /dev/rmt/0m /var

result:
# tar cf /dev/rmt/0m /var
tar: cannot open /dev/rmt/0m

Also,
# mt -f /dev/rmt/0m rewind
/dev/rmt/0m: No such device or address

I issued:
# lssf /dev/rmt/0m

result:
#stape card instance 3 SCSI target 0 SCSI LUN 0 at&t best density available at address 14/0/3.0.0 /dev/rmt/0m

Any ideas what's going wrong? Please suggest me some steps that test the tape. After testing is complete approx. 30GB data should be backed up into it.

[RAC_1]

Baffeled with that. Perms on /dev/rmt/0m??

Anil

[Chang_6]

Hi,

I was doing that as root. Here's the listing. Please help.

# ls -l /dev/rmt
total 0
crw-rw-rw- 2 bin bin 205 0x030000 Aug 3 14:08 0m
crw-rw-rw- 2 bin bin 205 0x030080 Aug 3 14:08 0mb
crw-rw-rw- 2 bin bin 205 0x030040 Aug 3 14:08 0mn
crw-rw-rw- 2 bin bin 205 0x0300c0 Aug 3 14:08 0mnb
crw-rw-rw- 2 bin bin 205 0x030000 Aug 3 14:08 c3t0d0BEST
crw-rw-rw- 2 bin bin 205 0x030080 Aug 3 14:08 c3t0d0BESTb
crw-rw-rw- 2 bin bin 205 0x030040 Aug 3 14:08 c3t0d0BESTn
crw-rw-rw- 2 bin bin 205 0x0300c0 Aug 3 14:08 c3t0d0BESTnb
crw-rw-rw- 1 bin bin 205 0x030001 Aug 3 14:08 c3t0d0DDS
crw-rw-rw- 1 bin bin 205 0x030081 Aug 3 14:08 c3t0d0DDSb
crw-rw-rw- 1 bin bin 205 0x030041 Aug 3 14:08 c3t0d0DDSn
crw-rw-rw- 1 bin bin 205 0x0300c1 Aug 3 14:08 c3t0d0DDSnb
crw-r--r-- 1 bin bin 205 0xfffffe Nov 23 1999 stape_config

[Steven E. Protter]

Check the write tab on the tape. I would think if the scisi card is lun 0 th drive should have a different number.

SEP

[Gary L. Paveza, Jr.]

Stupid question, but is there a tape in the drive? And is it write-protected?

The tar cf error could be either.

mt rewind could be no tape.

[Bharat Katkar]

Hi,
Check the thread below:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=635088
I think it simulates your problem.
Regards,

[Chang_6]

Hi,

I read it, not sure what
"for those devices that only seem to have a cXtYdZ device file" means

I don't seem to have that one here

[Chang_6]

I also issued insf -e and then tried

#mt -f /dev/rmt/0m rewind

It said:

#/dev/rmt/0m: No such device or address

[Chang_6]

Also,

How to confirm there is tape in the drive?

Please suggest

[Bharat Katkar]

Kumar,

what i would suggest is to do rmsf on all unused speial files in /dev/rmt but be carefull and then execute insf -e. That thread addresses that there are 2 files accesing the same device.
That should create fresh and unique file for your tape device.

Hope that helps.
Regards,

[Chang_6]

Bharat,

Thank you very much for the response.

I did this a couple of hours back

) ioscan -fnC tape
2) rmsf -H 0/12/0/../../..
3) insf -H 0/12/0/../../..


I also issued insf -e.

Now, could you please explain the steps little bit clear? Could you please give me what to do in an order? Thanks a million in advance.

[RAC_1]

mt -f /dev/rmt/c3t0d0BEST

What does it say??

Anil

[Chang_6]

Anil,

mt -f /dev/rmt/c3t0d0BEST
usage: mt [ -f tapename ] command [ count ]
command is one of:
eof, fsf, bsf, fsr, bsr, rewind, offline, eod, smk, fss, bss, reserve, release, status

[A. Clay Stephenson]

The first thing that I would do is install the latest stape driver patch, PHKL_29899.

[Patrick Wallek]

>>How to confirm there is tape in the drive?

Go look at the drive, or try

# mt -f /dev/rmt/0mn status

If it returns an error you almost certainly do NOT have a tape in the drive.

[RAC_1]

Oh, I mean mt -f /dev/rmt/c3t0d0BEST stat

Anil

[Chang_6]

Anil,

mt -f /dev/rmt/c3t0d0BEST stat
Drive: HP C5713A
Format:
Status: [0]
File: 0
Block: 0

[RAC_1]

Now I think the problem is with /dev/rmt/0m device file.

ls -il /dev/rmt/0m
ls -il /dev/rmt/c3t0d0BEST

Anil

[Chang_6]

Anil,

ls -il /dev/rmt/0m
1856 crw-rw-rw- 2 bin bin 205 0x030000 Aug 3 14:08 /dev/rmt/0m

ls -il /dev/rmt/c3t0d0BEST
1856 crw-rw-rw- 2 bin bin 205 0x030000 Aug 3 14:08 /dev/rmt/c3t0d0BEST

Thanks

[RAC_1]

They both are same files. The inode nos are same.

rmsf /dev/rmt/0m
mknod /dev/rmt/0m c 205 0x030000
chown bin:bin /dev/rmt/0m
chmod 666 /dev/rmt/0m

mt -f /dev/rmt/0m stat

Anil

[Chang_6]

Anil,

Thanks again.

# rmsf /dev/rmt/0m
# mknod /dev/rmt/0m c 205 0x030000
# chown bin:bin /dev/rmt/0m
# chmod 666 /dev/rmt/0m
# mt -f /dev/rmt/0m stat
Drive: HP C5713A
Format:
Status: [0]
File: 0
Block: 0
# mt -f /dev/rmt/0m rewind
/dev/rmt/0m: No such device or address

I see "No such device or address" message again. Whats happening?

[RAC_1]

mt rewind
What does it say???

Anil

[RAC_1]

Is it giving error because, the tape is already rewinded.

mt -f /dev/rmt/0m stat
Make sure it is at file 0
mt -f /de/rmt/0mn fsf 1
mt -f /dev/rmt/0m rewind

Anil

[Chang_6]

Anil,

mt rewind
/dev/rmt/0mnb: No such device or address


It says "/dev/rmt/0mnb" not "/dev/rmt/0". May I know why?

Please tell if I should test these now?

mt -f /dev/rmt/0m stat
Make sure it is at file 0
mt -f /de/rmt/0mn fsf 1
mt -f /dev/rmt/0m rewind

[RAC_1]

If I remember correctly mt rewind should take default device - /dev/rmt/0m

Yes, please try following.

mt -f /dev/rmt/0m stat
Make sure it is at file 0
mt -f /de/rmt/0mn fsf 1
mt -f /dev/rmt/0m rewind

Anil