AIX + backup or mksysb (yes i did a search)


 
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# 1  
AIX + backup or mksysb (yes i did a search)

Whats up guys. I dont ask many questions but this time i need a quick one answerd.

NOS: AIX 4.3.3 and 4.3.2
BOX: RS/6000 F50

i have 12 pv's (mirrored) and 2 vg's and i want them both backed up @ once on one tape drive so i can do it via cron.

I have looked at mksysb and backup. my main question would be

I know if i do a "/usr/bin/mksysb '-i' /dev/rmt0" it will backup rootvg. is there also a way to get it to back up vg1?

OR

would you recomment I do a "/usr/sbin/backup -f'/dev/rmt0' -'0' '-u' /cw_d01" for each jfs? and can i add more then just cw_d01 to the backup command to look something like this:

/usr/sbin/backup -f'/dev/rmt0' -'0' '-u' /cw_d01 /usr /home
# 2  
would this be more senseable?

Code:
#! /bin/ksh
#
#       This script is intended to be used on AIX 4.3.3 and 4.3.2 ONLY.
#       This will use the backup utility doing a level 0 dump on any filesystem defined for $filesys and update /etc/dumpdates.
#       Arguments:
#               DEVICE = backup device
#               DUMPINFO = file that will collect info to be emailed out
#               MARK = possition on the tape
#

DEVICE="/dev/null"
DUMPINFO=/var/adm/dumpinfo
FILESYSTEMS="/ /usr /var /home /cw_d01 /cw_t01"
MARK=1

echo > $DUMPINFO

for filesys in $FILESYSTEMS; do
        echo "Date: `date`
Filesystem: $filesys
Position: $MARK
Device: $DEVICE
        " >> $DUMPINFO
        /usr/sbin/backup -f $DEVICE -0 -u $filesys
        MARK=`expr ${MARK} + 1`
done
sleep 20
mt -f $DEVICE rewoffl


Last edited by Optimus_P; 08-08-2001 at 07:17 PM..
# 3  
For backing up vg1 you can use the command "savevg". Look at man savevg. The syntax is simitar to mksysb. tho put it in the same tape, try using for the backup device /dev/rmt0.1 (norewind). I did not the test, but teorically the command will not rewind the tape and the next command will continue in the tape without overwriting the data.

any questions tell me.

HTT
# 4  
i am reading the man page right now.
# 5  
IMHO, mksysb is not just a backup.
It's the first step in a complete 'Computer Disaster Recovery' plan that let's you recreate your system in case off 'something going very wrong'.

So, dispite the tools one uses to make backups of his/her system, always make a mksysb tape when you change something to AIX the software or the root volume group.

Regards
Gert
# 6  
well i have opted to just go with /usr/bin/backup for my filesystems. I liek the way the restore command is just like ufsrestore.

I checked into savevg and its restore counterpart and altho they do look very niCe. I couldnt decifer from the man page if i can do a file by file search and restore. so the above script will work. Smilie
 

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