[Box Backup-dev] Soft-RAID support

David Sommerseth boxbackup-dev@boxbackup.org
Mon, 01 Jun 2009 12:01:35 +0200


Hi!

I was reading through the BoxBackup documentation, and one crucial point of 
why I chose BoxBackup seems to change ...

"The server currently supports a kind of RAID 5 in userland for extra 
reliability. It is designed to use three separate paths which are mounted 
from three separate physical disks (not partitions on the same disk!). This 
is deprecated and will be removed in a future version. We recommend that 
you disable it instead, otherwise you may lose your stored data when this 
feature is removed. "
http://www.boxbackup.org/trac/wiki/ConfiguringAServer

Is there any reasons this will be changed?  I am currently using this 
feature for one reason:  Safe distributed backup.

I have several clients connecting to the BoxBackup storage server via local 
network or VPN.  The next phase I'm about to implement is to distribute 
each of these 3 data folders to 3 different physical locations.  This way I 
don't need to worry too much if one remote location gets compromised, as 
the theory explained in the documentation is that you need minimum two sets 
to rebuild the third set to make the data usable.  If one set gets 
compromised we will have plans how to rebuild the backup storage and 
distribute three complete new sets to new locations and destruct the two 
remaining remote sets.

When the data is encrypted in addition, it really provides a good solution 
for secure distributed remote backup.  Of course, the main backup server 
got all three directories available.  But the security level of this server 
location is also higher.

My idea for those 3 remote storages was to locate them in physically remote 
  places within the organisation, or maybe in some cases at some associates 
homes.  As the backup data is encrypted and you need to restore 2/3 of the 
directories, this is considered safe enough.

I evaluated BoxBackup and set it up before this part of the documentation 
changed.  Anyhow, there's also a contradictory sentence later on in the 
same URL:

"NOTE Running the server in non-RAID mode has not been tested as 
extensively as in RAID file mode."


kind regards,

David Sommerseth