topic Re: backup device in Operating System - Linux

backup device

peterchu — Tue, 18 May 2004 20:39:23 GMT

We have DDS4 tape device and use the device /dev/st0 can backup/restore DDS4 tape but can't do it for DDS3 tape , as I know DDS4 drive support DDS3 tape , could suggest what device ( dev/st?? ) can do that ? thx

Re: backup device

Naveej.K.A — Tue, 18 May 2004 22:38:16 GMT

hi,
put the dds3 catridge in the DDS4 drive.
mt -f /dev/st0 status

what does it return
I have successfully used dd3 catridges on a dds4 drive

with best wishes
Naveej

Re: backup device

Shaikh Imran — Tue, 18 May 2004 23:43:32 GMT

Hi,
DDS3 DATs Will work in DDS4 Drive without any problem and the same device file can be used.
Please refer the below link for the compatibility matrix:
http://www.hp.com/products1/storage/products/storagemedia/tape_dds/compatibility.html

Regards,
Imran

Re: backup device

Steven E. Protter — Wed, 19 May 2004 00:10:30 GMT

Device files handle hardware interaction, not tape type.

It will work. I've done it. Just give it a try.

SEP

Re: backup device

peterchu — Wed, 19 May 2004 01:07:57 GMT

edp> mt -f /dev/tape status
SCSI 2 tape drive:
File number=0, block number=0, partition=0.
Tape block size 2048 bytes. Density code 0x25 (DDS-3).
Soft error count since last status=0
General status bits on (41010000):
BOT ONLINE IM_REP_EN
edp> tar -tvf /dev/tape
tar: /dev/tape: Cannot read: Input/output error
tar: At beginning of tape, quitting now
tar: Error is not recoverable: exiting now

Re: backup device

Shaikh Imran — Wed, 19 May 2004 01:39:49 GMT

Hi,
Do you get the same error while taking the backup ?
Have you tried replacing with other new DDS3 tape ?

Regs

Re: backup device

Mark Grant — Wed, 19 May 2004 01:48:02 GMT

Looks like a dodgy tape to me. Try another or the same if you don't mind destroying the data and try writing to it first.

Re: backup device

Yong_7 — Thu, 20 May 2004 09:20:42 GMT

Hi,

to be specific:

put DD3 tape in

# mt -f /dev/st0 rewind

# dd if=/dev/zero of=/dev/st0 bs=512 100

any problem ?

Cheers !

YJ