http://grimore.i2p/unix/merge_filesystems
Setup The example setup presented here consists of two drives: /dev/sdb1 of 1TB /dev/sdc1 of 500MB In order to merge these two drives together, we first need a filesystem. In our case, we use ext4 for both drives - although we could have picked something different for each, and issue the commands: mkfs.ext4 -O 64bit,has_journal,extents,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize,dir_index -i 4194304 / dev / sdb1 respectively:...