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by these drives. In this case, only the data that is written on WORM media is
treated as WORM data. Data that is written on other types of media can be
overwritten.
LTO tape drives do not read from or write to 3592 tape cartridges, and 3592 tape
drives do not read or write to LTO tape cartridges. Refer to "Mixed media in
drives" on page 32 for detailed information about cartridge and drive
compatibility.
The LTO tape drives can read tapes that were written by non-IBM LTO drives.
They also write to tapes that can be read by non-IBM LTO drives.
All supported generations of LTO tape drives and cartridges can be in the same
frame.
When a cartridge is labeled according to IBM bar code label specifications, the last
character of its volume serial (VOLSER) number indicates the first drive generation
that supports the media. For example:
v 000764L8 is an LTO 8 cartridge
v 000764M8 is an LTO M8 cartridge
v 000764L7 is an LTO 7 cartridge
v 000764L6 is an LTO 6 cartridge
v 000764L5 is an LTO 5 cartridge
To enhance library performance, the LTO tape drives include speed matching,
channel calibration, and power management. Speed matching dynamically adjusts
the drive's normal native (uncompressed) data rate to the slower data rate of a
server. Channel calibration customizes each read/write data channel for optimum
performance. The customization enables compensation for variations in the
recording channel transfer function, media characteristics, and read/write head
characteristics. Power management reduces the drive's power consumption during
idle power periods.
To ensure that your tape drive conforms to IBM's specifications for reliability, use
only IBM LTO tape cartridges. You can use other LTO-certified data cartridges, but
they might not meet IBM standards of reliability.
Encryption
The LTO 5 and later LTO tape drives are encryption capable, which means they
can convert data into a cipher that ensures data security. The drive must first be
encryption-enabled. Select one of two methods of encryption management
(application-managed and library-managed encryption). Library-managed
encryption requires the purchase of FC 1604 (Transparent LTO Encryption). A key
is required to encrypt and decrypt the data. How a key is generated, maintained,
controlled, and transmitted depends on the operating environment where the tape
drive is installed. Some data management applications can also do key
management. For an alternative solution, IBM provides a key manager that works
with the keystore of your choice to accomplish all necessary key management
tasks. There is no recovery for lost encryption keys. Refer to the IBM Encryption
Key Manager and IBM Security Key Lifecycle Manager (formerly Tivoli
®
Key
Lifecycle Manager) publications in "Related information" on page xv. To choose a
method of encryption management, refer to TS4500 management GUI.
20
IBM TS4500: Introduction and Planning Guide
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