Can my LTO2 tape backup run on LTO4 tape drives and vice versa?
What is the logic behind this all.Lto4 tape restore on LTO 2 drives?
You can restore from LTO2
You can restore from LTO2 tape using the LTO4 drive, since LTO technology is backward compatible for one generation to read/write, and two generations for read.
See this on Wikipedia: (http://en.wikipedia.org/wiki/Linear_Tape-Open)
- An Ultrium drive reads data from a cartridge in its own generation and at least the two prior generations.
- An Ultrium drive writes data to a cartridge in its own generation and to a cartridge from the immediate prior generation in the prior generation format.
I don't know where you got the request to restore backups from LTO4 tape using LTO2 drive. That won't work.