I have an HDD partitioned with one partition used for media files, mounted somewhere on my system (which is a Debian Wheezy box). I would like to expand the space available for files in my mount directory - using an additional HDD, but without using another folder or a subfolder.
I understand LVM is an option - but for that I need to make the transition without moving or backing up any files (there's nothing critical there but I don't want it gone of course). Can this be done?
Also, a better option would be if the partitions on the old and new disk simply both 'contributed' space to the same place, so that individual files would be written either entirely on one disk or entirely on the second, and that if I took out the second disk it would just be usable as-is without LVM. Is that possible?
Update: I tried lvmify, but it blurted an error and didn't work.