UNIX for Advanced & Expert Users

/dev/md/dsk/d0 20174761 1778528 18194486 9% /
/dev/md/dsk/d30 17648810 1592139 15880183 10% /usr
/proc 0 0 0 0% /proc
mnttab 0 0 0 0% /etc/mnttab
fd 0 0 0 0% /dev/fd
/dev/md/dsk/d50 20174761 169661 19803353 1% /var
swap 45894120 40 45894080 1% /var/run
/dev/md/dsk/d82 77462104 65557 76621926 1% /ora82
/dev/md/dsk/d80 619608661 192256677 421155898 32% /ora80
/dev/md/dsk/d83 105157168 65554 104040043 1% /ora83
/dev/md/dsk/d81 25812168 25620 25528427 1% /ora81
/dev/md/dsk/d101 20174761 37277 19935737 1% /disk01
/dev/md/dsk/d102 17648810 34773 17437549 1% /disk02
/dev/md/dsk/d40 17648810 10360658 7111664 60% /opt
/dev/md/dsk/d60 17648810 18145 17454177 1% /tmp
/dev/md/dsk/d103 17648810 19367 17452955 1% /disk03
/dev/md/dsk/d70 15584811 15473 15413490 1% /export/home



I have aboove file systems.
I have tape drive Ait3 and I was told tape can take max 200 with compression.
I want do full backup of all the file systems at once because it will be a while before we backup this box with netbackup .

What is the best way to do this.
It has around 300gb of data on it.
Is it better to use compression? If so how do we do it?
What is the bestway to backup...

Need help.

Just started to backup like following to see how long it takes..around 180gb

/usr/sbin/ufsdump 0cuf /dev/rmt/0 /dev/md/rdsk/ora80

Please help me....

I was told in solaris 9 there is a utitlity called snapshot...what exactly is it...

thanks.