I currently have a server which has a number of LVM volumes using software RAID for mirroring. Something like this:
sdd 8:48 0 894.3G 0 disk └─sdd1 8:49 0 465.8G 0 part └─md4 9:4 0 465.8G 0 raid1 /myfiles sdc 8:32 0 894.3G 0 disk └─sdc1 8:33 0 894.3G 0 part └─md4 9:4 0 465.8G 0 raid1 /myfiles
Actually, now that I look at that, I think LVM isn't in the picture since I don't see any
(dm-X) devices mentioned. :( I am using LVM for
/home but not
Is there a way to slide-in an encryption layer (e.g.
dm-crypt) between the layers that comprise my
/myfiles filesystem? Or would I have to create a new set of partitions/devices using LVM and copy everything over?
In the past, I've migrated physical disks with zero downtime by breaking the RAID, swapping e.g.
sdc with a new disk, then letting the RAID system re-sync, then repeating the process with
sdd. Is it possible to prepare an encrypted volume underneath the RAID and use the same technique? Or do I have to switch to an LVM-managed volume in order to use e.g.
dm-crypt for that kind of thing?
I'm running a Linux 3.2 kernel and an
ext4 filesystem in this particular case, so I can't just enable