Storage » StorageBackup
Subtopics
Backup with LVM snapshot
Backup with Bacula
Backup to multiple dvd's
Linux backup with dump
The following scenario dumps a partition to a USB drive.Mounting the USB drive
As soon as the drive is plugged in, do a dmesg and find out the device name it's been assigned. Mine is /dev/sdc. Since I'll be using the entire disk for this operation, I format the drive with mkfs.ext3 /dev/sdc1Now mount the drive with these commands
mkdir -p /mnt/usbdrive mount /dev/sdc1 /mnt/usbdrive
Mount the source partition in readonly mode
Assuming the partition I want to back up is /dev/sda6mount -o remount,ro /dev/sda6
Start the dump process
dump 0uf /mnt/usbdrive/sda6.dmp /dev/sda6 DUMP: Date of this level 0 dump: Wed Jun 6 20:54:24 2007 DUMP: Dumping /dev/sda6 (/opt) to /mnt/usb/opt.dmp DUMP: Label: /opt DUMP: Writing 10 Kilobyte records DUMP: mapping (Pass I) [regular files] DUMP: mapping (Pass II) [directories] DUMP: estimated 4226843 blocks. DUMP: Volume 1 started with block 1 at: Wed Jun 6 20:55:10 2007 DUMP: dumping (Pass III) [directories] DUMP: dumping (Pass IV) [regular files] DUMP: 42.85% done at 6037 kB/s, finished in 0:06 DUMP: 100.00% done at 5052 kB/s, finished in 0:00 DUMP: Closing /mnt/usb/opt.dmp DUMP: Volume 1 completed at: Wed Jun 6 21:10:11 2007 DUMP: Volume 1 4549260 blocks (4442.64MB) DUMP: Volume 1 took 0:15:01 DUMP: Volume 1 transfer rate: 5049 kB/s DUMP: 4549260 blocks (4442.64MB) on 1 volume(s) DUMP: finished in 901 seconds, throughput 5049 kBytes/sec DUMP: Date of this level 0 dump: Wed Jun 6 20:54:24 2007 DUMP: Date this dump completed: Wed Jun 6 21:10:11 2007 DUMP: Average transfer rate: 5049 kB/s DUMP: DUMP IS DONE
Supposedly, one can also do a network dump with the rdump command
rdump 0uf tapeserver:/dev/nst0 /home
Restoring a partition with the dump file
Restore is easy. Change to the directory you want to restore data to, say I want to restore to /optcd /opt restore vrf /dev/usbdrive/sda6.dmp
Side-by-side dumping and restore
One can use the dump and restore commands to clone a partition. I have not tried it myself.cd /opt_clone dump 0uf - /opt | restore rf -
Do it remotely
ssh 10.42.3.42 'dump 0uf - /' | restore rf -
Tar-ring to a remote server
tar cvf - /home | ssh user@remote "(cd /; tar xvf -)"
Or use netcat
Recipientnc -l 1234 | tar xv
Sender
tar cf - <files> | nc -q1 <target_host> 1234 # some netcat variants does not take -q, use -c instead.
Use cpio to backup fileystem
The following command backs up / and do not cross to other filesystem under /find / -xdev | cpio -ovF /mnt/backup/root_bak.cpio
