topic Re: Problem in backup in Operating System - HP-UX

Problem in backup

Sugata — Thu, 06 May 2004 09:19:22 GMT

Hi,
I am having some problem during taking backup using tar command. I am using 40/80 GB DLT Tape. Although data is less than 40 GB, it is showing "end of tape" in the verbose mode. In tape drive display, it is showing "clean up the drive". I have done so, 2-3 times it didn't help. But backup using 'fback' command working fine.
Can anybody tell me, why 'tar' command is giving problem?
Regards,
Sugata

Re: Problem in backup

harry d brown jr — Thu, 06 May 2004 09:24:31 GMT

tar does NOT use compression.

I suggest you use GNU's tar, which has a compression option.

live free or die
harry

Re: Problem in backup

Hazem Mahmoud_3 — Thu, 06 May 2004 09:25:37 GMT

tar does not support files over 2GB. Do you have any over 2GB? If so, that might be where the problem is.

-Hazem

Re: Problem in backup

harry d brown jr — Thu, 06 May 2004 09:33:35 GMT

With GNU's tar, you do not have a 2GB limit on individual files.

Do you have the Tape drive compression enabled?

live free or die
harry

Re: Problem in backup

Jairo Campana — Thu, 06 May 2004 09:45:46 GMT

YES GNUTAR 2.0Gb
for download free tar support >2.0Gb

In the page personal of Merijn

https://www.beepz.com/personal/merijn/

GNUTAR AND GNUCPIO

Re: Problem in backup

Dave La Mar — Thu, 06 May 2004 18:59:28 GMT

Sugata -
One more option....
fbackup will work for files in excess of 2gb.
Attached is a doc made (lond ago when we were noew to HP-UX) for this.

Best regards,

dl

Re: Problem in backup

Kiyoshi Miyake — Fri, 07 May 2004 05:54:32 GMT

Hi,

Perhaps you have a lot of small file.
Or sparse files.

check tar archive size by using follow comannd.

tar cbf 20 - ./backup_volume_name | dd bs=1024 of=/dev/null

so, dd reports total size.
If this size is over 40GB, you have a lot of small file
or sparse files.

tar always pads information written to an archive up to the next
multiple of the block size.
(see man tar)

Thanks.