You can do 

dd if=/dev/sda of=back.sda bs=10M 


You can increase or reduce the bs(block size) based on your i/o capacity(fast increase,slow decrease),then copy the back.sda with scp or rsync on backup.
Later you can mount the image and recovery the files,this will work if sda is not broken disk,if is corrupted you can try a fsck.
Rsync works for files,i have never tried on block device but i think rsync sda copy only the sda block file(size 0) on remote backup
If the problem is unavaliable partition, you will resolve nothing with rsync,you must use kpartx,search google for kpartx lvm
Or try this

pvscan
vgscan
vgchange -ay


See the output and mount the volume

rsync partial LVM volume to Remote Directory
In ME1 and ME2, I had to make decisions not really understanding their impact on the series as a whole.  Now that I'm partway through ME3, I find myself curious as to what would have happened had I made a different choice previously.  What if I'd done X?  What if I'd let Y live/die?

I can't just replay ME3, import my ME2 save, and make different choices to see these outcomes - I'd have to make changes to the way I played ME/ME2.  Likewise, importing no save would make wholesale changes to my experience that I'm not sure I'd appreciate.   

Besides starting the entire series over again, and running through each game dozens of times to explore the various permutations, what can I do to change the way things play out in ME3?  Do I get the option to edit the imported starting state on New Game+?

I'm on the Xbox, so save file editing or importing from the internet is likely to be at least challenging, if not impossible.  
