Are drives mounted in Linux redundant?

If your ReadyNAS NV was running in Xraid mode,you can plug all the drives to Ubuntu system and execute below commands to get the data off from the disks

In a terminal window:

(1) sudo su
(2) apt-get install fuseext2
(3) apt-get install lvm2
(4) modprobe fuse
(5) vgscan
(6) vgchange -ay c
(7) fuseext2 -o ro -o sync_read /dev/c/c /mnt

if your the disks were created in Flex Raid,you need to use mdadm to start raid first

#mdadm --assemble /dev/md125 /dev/sd[abcd]3 --update=uuid 
#pvscan
#vgscan
#lvscan 
#vgchange -a y c
#fuse-ext2 /dev/c/c /mnt

note:sd[abcd]3 means 3rd partition of each disk,you can execute command "cat /proc/partitions" to check on your Linux computer.