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Q: What is the best way to backup & restore my XigmaNAS system partition?
Using DD is a quick and relatively simple way to backup and restore your data. DD is a very powerful tool, for reference you should take a look at powerofdd.pdf (thanks to Dan Merschi) and ensure you understand what is happening before disaster strikes.

Always make sure you know which device you are copying from/to. If you make a mistake you could erase valuable data.

To create a backup image of your partition:
1 - If your system disk(HDD) is ad0 and you have a volume mounted on /mnt/share you can use DD to create an image of the system partition on your storage volume as follows:

dd if=/dev/ad0s1 of=/mnt/share/partition_backup.dd bs=16k

The extension is not important, you should use one just so you know that the image was created using DD .

2 - If the system is instaled on USB/CF/Flash drive the command should be:

dd if=/dev/da0 of=/mnt/share/partition_backup.dd bs=16k

To restore your partition from a backup image:
For command #1, above:

dd if=/mnt/share/partition_backup.dd of=/dev/ad0s1 bs=16k

For command #2, above:

dd if=/mnt/share/partition_backup.dd of=/dev/da0 bs=16k
Basic Data recovery and backups ⇒
faq/0089.txt · Last modified: 2018/08/10 23:15 by zoon01