I'm trying to determine if a particular approach might work for "offsite backup 
copy" of BackupPC data store, more-or-less based on a matched pair of hot-swap 
SATA LVM disk sets.. and specifically I was wondering if anyone else does 
something thus?

ie: (numbers are for illustration only..)

-assume BackupPC is storing data locally on a raid disk array, call it a 
~500gig pool for illustrative purposes.

-independant of the raid array disks for above data, we have a 4-bay sata 
hot-swap disk set(4x200gb = 600gb in raid 5 LVM) and also a second (spare) set 
of (identical) disks in trays (4x200gb = 600gb in Raid5-lvm)

-once per week, data is copied from ~500gb local pool into the 4-sata disk 
hot-swap volume.  When done, this raid array is taken offline, and the [well 
labelled :-)] disks are pulled and transferred to a secure offsite location.

-spare set of [well labelled :-)] 4-SATA disks in trays come from offsite 
location, insert to backupPC server, mount the raid. We're ready to repeat 
process.


Additionally, I suppose - based on how quick the data pool evolves, rsync could 
be used to update the (rotating disk pool raid5 data) which might be faster 
than doing (reformat and clean copy) each week.  Or maybe not.

Just curious if anyone does something like this; if there are obvious issues or 
the like.

(Clearly it gets a bit cumbersome for a data pool that is too large .. lugging 
20 SATA disks wouldn't be fun .. but for "reasonable" data pool size it ?seems? 
like it could be feasible?)


Many thanks,


Tim Chipman



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