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Full Discussion: tar and vdump on same tape?
Top Forums UNIX for Advanced & Expert Users tar and vdump on same tape? Post 302224073 by yasin on Tuesday 12th of August 2008 07:25:55 AM
Old 08-12-2008
Quote:
Originally Posted by BOFH
You should have no problem putting multiple types of file systems on a tape assuming there's enough room to hold it.

You'll need to "fast forward" past the tar backup (I do this on Solaris so I can't guarentee the commands I'm offering here will help, but maybe the concepts will help you find the proper commands on your OS):

mt -f /dev/rmt/0n fsf 1

On Sun, the 0n device is the first tape but it's the "no rewind device" so mt will forward to the first block past the EOF and not rewind the tape (this is important). You can change the last number if you want to back up a third block of data.

Next use the backup command to back up the data. If you have another file system to back up, you can continue past the vdump backup as long as you use a "no rewind device" for vdump. Otherwise you'll have to jump past two backup blocks:

mt -f /dev/rmt/0n fsf 2

To restore from the second backup on the tape, you use the same mt command to get past the first EOF block to the vdump backup and then restore it.

Hope that helps as I don't know what vdump is. You can also pick up O'Reilly's backup and recovery book. Excellent book.

Carl


Hi,


first of all use:
ufsdump 0ucf /dev/rmt/0hbn /
this comand to do the backup for any file system ( here we do for root). notice the following
h : stands for high density tape
b: block
n: no rewind
0: the name of drive 1 or 2 or 3 as you defind it


second use :
tar cvf /rmt/0hbn /dataaa (dataaa is your data that you want to back it up).


yasin
 

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LEARN ABOUT REDHAT

amverify

AMVERIFY(8)						      System Manager's Manual						       AMVERIFY(8)

NAME

       amverify - check an Amanda tape for errors

SYNOPSIS

       amverify config [ slot [ runtapes ] ]

DESCRIPTION

       Amverify  reads	an  Amanda  format  tape  and makes sure each backup image can be processed by amrestore and, if possible, the appropriate
       restore program (e.g. tar).

       Amverify runs amrestore on each file of the tape and pipes the output to a restore program (if available) with an option to create a  cata-
       logue of the backup.  The catalogue itself is discarded.  Only the success or failure of the operation itself is reported.

       If  the	backup image cannot be processed by the restore program, e.g. if it was written on a different operating system, the image is sent
       through dd to /dev/null.  This still determines if the tape is readable, but does not do any internal consistency check on the image.

       If config is set up to use a tape changer, the slot argument may be used to choose the first tape to process.  Otherwise, the current  slot
       is used.

       The runtapes configuration parameter determines how many tapes are processed unless it is specified on the command line.

       See the amanda(8) man page for more details about Amanda.

AUTHOR

       Axel Zinser <fifi@icem.de>

SEE ALSO

       amrestore(8), amanda(8), amverifyrun(8)

																       AMVERIFY(8)
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