On Thu, 21 Mar 2002 at 10:53am, Mark Schoonover wrote > RH 7.2 with approx 180 GB of disk space available, with about 25 GB used. > Two Exabyte Eliant 820s tape drives that are 8 GB native. ( I know, get > bigger drives!! I will... )
7GB native using 160mXL tapes -- that's what I use. 25GB used is not a problem. But... > Mount list: > > /dev/sda5 on / type ext3 (rw) > none on /proc type proc (rw) > usbdevfs on /proc/bus/usb type usbdevfs (rw) > /dev/sda1 on /boot type ext3 (rw) > /dev/sdb2 on /data type ext3 (rw) > none on /dev/pts type devpts (rw,gid=5,mode=620) > /dev/sdb1 on /home type ext3 (rw) > none on /dev/shm type tmpfs (rw) > /dev/sda2 on /usr type ext3 (rw) > /dev/sda6 on /var type ext3 (rw) > /dev/cdrom on /mnt/cdrom type iso9660 (ro) > > In my disklist file, I've tried to do the following: > > localhost /dev/sda comp-high Here's the first thing you must understand -- amanda basically schedules and coordinates backups. It doesn't actually get the bits off the platters. To do that it relies either on dump or tar. dump can be used only on partitions (sda1 (or /boot), sda5 (or /), etc in the above). tar can be used on any directory whether or not it is it's own partition (e.g. /home or /home/user1, /home/user2, etc). Neither dump nor tar can directly back up the raw sda device. To get your 25GB backed up (even with only one drive), you split your physical disks into a number of disklist entries. After getting an initial level 0 of all your filesystems, amanda will attempt to balance the dumps, spreading level 0s throughout the dumpcycle as needed. To use more than one drive in one config (although you really don't need to with only 25GB used), you need to use chg-multi as your "tape changer". -- Joshua Baker-LePain Department of Biomedical Engineering Duke University
