{{parent page="Storage"}}

**Subtopics**
==[[StorageLVMSnap Backup with LVM snapshot]]==
==[[StorageBacula Backup with Bacula]]==
==[[StorageDVDBackup 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/sdc1**

Now mount the drive with these commands
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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/sda6
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mount -o remount,ro /dev/sda6
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==Start the dump process==
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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
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rdump 0uf tapeserver:/dev/nst0 /home
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==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 /opt
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cd /opt
restore vrf /dev/usbdrive/sda6.dmp
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==Side-by-side dumping and restore==
One can use the dump and restore commands to clone a partition. I have not tried it myself.
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cd /opt_clone
dump 0uf - /opt | restore rf -
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Do it remotely
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ssh 10.42.3.42 'dump 0uf - /' | restore rf -
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==Tar-ring to a remote server==
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tar cvf - /home | ssh user@remote "(cd /; tar xvf -)"
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==Or use netcat==
Recipient
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nc -l 1234 | tar xv
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Sender
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tar cf - <files> | nc -q1 <target_host> 1234
# some netcat variants does not take -q, use -c instead.
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==Use cpio to backup fileystem==
The following command backs up / and do not cross to other filesystem under /

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find / -xdev | cpio -ovF /mnt/backup/root_bak.cpio
%%