topic Re: fbackup in Operating System - HP-UX

fbackup

Frances Prindle — Fri, 17 Nov 2000 19:55:10 GMT

How do you make a copy of a fbackup tape?

Re: fbackup

Kofi ARTHIABAH — Fri, 17 Nov 2000 20:08:37 GMT

if you have two drives you could do:

dd if=/dev/rmt/0m of=/dev/rmt/1m

where 0m would be the source drive and 1m would be the destination drive.

Re: fbackup

Frances Prindle — Fri, 17 Nov 2000 20:10:53 GMT

dd cannot be used with fbackup format

Re: fbackup

Kofi ARTHIABAH — Fri, 17 Nov 2000 20:42:36 GMT

aghhh!!! sorry about that I should have read the message more closely... hmmm.. thats right, fbackup writes that special label/header to the tape.

DISCLAIMER - I am a bit rusty with my fbackup stuff, but just an idea - how about this... use frecover from the source and pipe it to fbackup on the second tape.

Re: fbackup

Christian Aichmair — Sat, 18 Nov 2000 00:38:03 GMT

Hi !
Duplicating a fbackup-Tape is not so easy, as tape-format depends on fbackup-Options (records, blocksperrecords, etc.).
The 1.st Record (I think) is always a 512 Bytes Header, then the Index-File, than follow a lot of EOF-separated Files.

I used "tcopy" (Public Domain) for copying fbackup-tapes about 6-7 years ago, I think it should work with the new fbackup-version tapes also.

Hope it helps,
schneck c/o Christian Aichmair

Re: fbackup

Kevin Ernst — Mon, 20 Nov 2000 21:13:50 GMT

More answers here (a duplicate of your original post, I guess):

http://forums.itrc.hp.com/cm/QuestionAnswer/1,1150,0x01eea14d9abcd4118fef0090279cd0f9,00.html

Re: fbackup

Kevin Ernst — Mon, 20 Nov 2000 21:15:13 GMT

(...and hopefully a workable solution)

Re: fbackup

jherring — Wed, 22 Nov 2000 04:54:04 GMT

making a copy of a fbackup tape is not easy and was not intended to be possible.

there are people who have succeeded however using combinations of different block sizes and the dd command.

I would not trust any fbackup tape that was copied as a viable DRP as I have seen it work and using the same commands it has failed the next time.

good luck

JOn

Re: fbackup

Steffi Jones_1 — Wed, 22 Nov 2000 05:11:03 GMT

Hello,

The dd(1) command can be used to duplicate backup tapes created by most
standard HP-UX backup utilities.

Note: The examples shown here assume default command operation - if
variations are made when creating the backups (especially in the area of block
size, etc.), then these examples may need to be altered to work properly.

Duplicating tar(1) tapes

Copy contents of tar(1) tape to disk:
# dd if=/dev/rmt/ of=/tmp/tar.contents bs=10k

Copy disk file to new tape:
# dd if=/tmp/tar.contents of=/dev/rmt/ bs=10k

Verify new tape is readable by tar(1):
# tar -tvf /dev/rmt/

Duplicating cpio(1) tapes

Copy contents of cpio(1) tape to disk:
# dd if=/dev/rmt/ of=/tmp/cpio.contents bs=5k

Copy disk file to new tape:
# dd if=/tmp/cpio.contents of=/dev/rmt/ bs=5k

Verify new tape is readable by cpio(1):
# cpio -icvBt < /dev/rmt

Duplicating dump(1)/vxdump(1) tapes

Copy contents of dump(1)/vxdump(1) tape to disk:
# dd if=/dev/rmt/ if=/tmp/dump.contents bs=32k

Copy disk file to new tape:
# dd if=/tmp/dump.contents of=/dev/rmt/ bs=32k

Verify new tape is readable by restore(1)/vxrestore(1):
# restore tf /dev/rmt/, or
# vxrestore tf /dev/rmt/

fbackup(1M) (or SAM) tapes

Note: Unfortunately, fbackup(1M) (and SAM) creates backup volumes with a format that makes duplication of volumes by dd(1)
impossible.

See fbackup(1M) manpage for more information.

Steffi Jones