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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 CENTOS

backup_apropos

BACKUP_APROPOS(8)					       AFS Command Reference						 BACKUP_APROPOS(8)

NAME

       backup_apropos - Displays each help entry containing a keyword string

SYNOPSIS

       backup apropos -topic <help string> [-help]

       backup ap -t <help string> [-h]

DESCRIPTION

       The backup apropos command displays the first line of the online help entry for any backup command that has in its name or short
       description the string specified by the -topic argument.

       To display the syntax for a command, use the backup help command.

OPTIONS

       -topic <help string>
	   Specifies the keyword string to match, in lowercase letters only.  If the string is more than a single word, surround it with double
	   quotes (" ") or other delimiters.

       -help
	   Prints the online help for this command. All other valid options are ignored.

OUTPUT

       The first line of a command's online help entry names it and briefly describes its function. This command displays the first line for any
       backup command where the string specified with the -topic argument is part of the command name or first line.

EXAMPLES

       The following example lists all backup commands that include the word "tape" in their names or short descriptions:

	  % backup apropos tape
	  labeltape: label a tape
	  readlabel: read the label on tape
	  scantape: dump information recovery from tape
	  status: get tape coordinator status

PRIVILEGE REQUIRED

       None

SEE ALSO

       backup(8), backup_help(8)

COPYRIGHT

       IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.

       This documentation is covered by the IBM Public License Version 1.0.  It was converted from HTML to POD by software written by Chas
       Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.

OpenAFS 							    2012-03-26							 BACKUP_APROPOS(8)
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