HP StoreEver DAT Tape Drives - Manual (Page 52)

Does encryption affect tape drive performance?
Hardware encryption can be used with or without compression and without speed or capacity penalties.
Does the tape drive encrypt media in an earlier DAT format?
No. Encryption is supported only on DAT 320 GB media.
DAT 320 GB TB tapes encrypted on DAT 320 tape drives can be read on any compatible DAT 320
tape drive that supports hardware encryption.
DAT 320 tape drives can read DAT 160 GB media and write DAT 160 GB media, but hardware
encryption is not supported on these formats.
Where can I get more information?
For detailed instructions about enabling encryption please refer to the documentation supplied with
your backup application. This will also highlight any default states, for example when copying tapes,
that may need changing if using encrypted tapes.
Write-protecting cartridges
If you want to protect the data on a cartridge from being altered or overwritten, you can write-protect
the cartridge.
Always remove the cartridge from the tape drive before you change the write protection.
• To write-protect a cartridge, slide the tab on the rear of the cartridge so that the recognition hole
is open.
• To write-enable a cartridge, slide the tab back so that the hole is closed.
Write-protection will not protect your cartridges against magnets (or bulk erasers).
Use the correct media 52