Each IBM LTO 6 cartridge features 2.5TB of native storage capacity,
or 6.25TB of capacity when compressed. LTO 6 also boast higher transfer
speeds of up to 400MB/s (compressed, 160MB/s native).
LTO 6 continues to offer the LTFS (Linear Tape File System) tape
format that was introduced in LTO 5, providing a file system view of the
media. You can drag and drop files from the server and easily see a
list of what's saved on the tape. Individual tapes can be transported
between LTO 6 systems to provide flexibility and convenience for reading
and moving files on your LTO 6 tapes.
You will need an LTO 6 drive to read your LTO 6 media. However, the
drives are "backwards compatible". When you upgrade to an LTO 6 drive,
it will still be able to read and write your LTO 5 cartridges, and read your LTO 4 tapes.
LTO 6 Tapes 
