topic Re: backup in Operating System - Linux

backup

Fadia Almarei — Tue, 13 Apr 2004 07:33:20 GMT

Hi All

i want to know that if there is any apecial command for backup large files , and is there is any special option for the tar command for archiving large files
Regards,
Fadia

Re: backup

Mobeen_1 — Tue, 13 Apr 2004 07:40:09 GMT

Fadia,
Have you tried man tar to see what probably suits things that you are trying to accomplish?

rgds
Mobeen

Re: backup

Martin P.J. Zinser — Tue, 13 Apr 2004 09:54:36 GMT

Hello Fadia,

could you please give us some more context on your problem. What are you trying to do and what type of error do you receive? Disk to disk tar, tar to a tape...?

Greetings, Martin

Re: backup

Francisco J. Soler — Tue, 13 Apr 2004 11:27:58 GMT

Hi fadia,
If you mean that you need backup through several media devices, you can try:

http://www.microwerks.net/~hugo/index.html
http://www.microwerks.net/~hugo/download/contribute.html#rht80

Frank.

Re: backup

Fred Ruffet — Tue, 13 Apr 2004 12:02:09 GMT

If you mean "more than 2Gb files" by large files, tar have a limitation and cannot store thoses files.

If you have such files, you must use another backup program. I would suggest arkeia :
http://www.arkeia.com/ which is free for a linux server backuping itself. It handles correctly 2Gb on any filesystems and has a command line interface as well as a GUI. It can do from one-shot-backup to complex backup strategies with incrementals, retentions and so on...

Re: backup

Martin P.J. Zinser — Tue, 13 Apr 2004 16:06:06 GMT

Hello,

the following

https://listman.redhat.com/archives/phoebe-list/2003-February/msg00832.html

seems to indicate that the 2GB file limit for tar was liftet latest with RH 8.

Greetings, Martin

Re: backup

Martin P.J. Zinser — Tue, 13 Apr 2004 22:03:04 GMT

To follow up on my self. The 2 GB file size limit was liftet for Gnu tar with release
1.13. See here

http://freshmeat.net/projects/tar/?branch_id=17853&release_id=56187

for details.

Greetings, Martin

Re: backup

Fadia Almarei — Wed, 14 Apr 2004 01:33:53 GMT

my problem is i v=connect an external DELL dlt scsi tape drive to my linux system and i want to do backup for my system on that tape drive and when i do the tar command the following error arise[root@RADIUS root]# tar cvf /dev/st0 /
tar: Removing leading `/' from member names

lost+found/
backup/
backup/lost+found/
boot/
boot/lost+found/
boot/grub/
boot/grub/grub.conf
boot/grub/splash.xpm.gz
boot/grub/menu.lst
boot/grub/device.map
boot/grub/stage1
boot/grub/stage2
tar: /dev/st0: Wrote only 0 of 10240 bytes
tar: Error is not recoverable: exiting now
[root@RADIUS root]#

and when i do the tar command for a small file it work please help ,manly is the error from the tape drive or from the tar command

Re: backup

Stuart Browne — Wed, 14 Apr 2004 01:48:06 GMT

Have you tried another tape?

That's standard can't-write-to-the-tape errors, not tar.

Had it this morning on a DAT40 drive. Run the cleaning tape through, try another tape, see if the problem persists.

Re: backup

Fadia Almarei — Wed, 14 Apr 2004 02:02:02 GMT

Dear staurt

i change the tape and i get the same error i want to know what to do for that and for more i do the backup using dump and it gives me also error

thanks in advance

Re: backup

Francisco J. Soler — Wed, 14 Apr 2004 02:42:27 GMT

Hi Fadia,
try to exclude /proc in the tar command:

tar cvf /dev/st0 / --exclude /proc

Frank.

Re: backup

Fadia Almarei — Wed, 14 Apr 2004 02:45:03 GMT

sorry it does not work

Re: backup

Fred Ruffet — Wed, 14 Apr 2004 02:45:34 GMT

have you tried fsck ? or just tried to dd the file that is breaking the tar (it might not be the last printed by tar, but the next)

Re: backup

Fadia Almarei — Wed, 14 Apr 2004 02:50:41 GMT

it also does not work

Re: backup

Francisco J. Soler — Wed, 14 Apr 2004 03:33:14 GMT

Hi Fadia,
try this to see if is a tar problem or a tape problem:

find / -path '/proc' -prune -o -print | cpio -ocv > /dev/st0

to recover the backup:
cpio -icv < /dev/st0

to list the backup
cpio -itcv < /dev/st0

Frank.

Re: backup

Fadia Almarei — Thu, 15 Apr 2004 02:24:16 GMT

Dear Frank
Thanks for your help , when i do the command it give me the following result "[root@RADIUS dev]# find / -path /proc -prune -o -print | cpio -ocv > /dev/st0
/
/lost+found
/backup
/backup/lost+found
/boot
/boot/lost+found
/boot/grub
/boot/grub/grub.conf
/boot/grub/splash.xpm.gz
/boot/grub/menu.lst
/boot/grub/device.map
/boot/grub/stage1
Found end of tape. To continue, type device/file name when ready.

what should i do for that i think that the dlt tape drive is big enough to do my backup

Re: backup

Francisco J. Soler — Thu, 15 Apr 2004 03:12:20 GMT

Hi, Fadia

Check if the tape is not write protect, is a silly thing but sometimes is the problem.

Frank.

Re: backup

Kiyoshi Miyake — Thu, 15 Apr 2004 04:34:54 GMT

Hi, fadia.

Try to new DLT tape if you use used tape by some backup utility.
Some application set partition on tape.

or:
Use mt command for erase partition.
I don't know mt command well...

Thanks.

Re: backup

Fadia Almarei — Thu, 15 Apr 2004 04:41:16 GMT

Thanks All

i have solved the problem , it was that i put a terminator in the second port of the scsi tape drive (it is dual port ),thanks all again for your help

Regards,
Fadia