IBM System Storage TS2900, Setup, Operator, And Service Manual

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5-4
TS2900 Tape Autoloader Setup, Operator, and Service Guide
Figure 5-2. Ultrium WORM Tape Cartridge
Data Security on WORM Media
Certain built-in security measures help ensure that the data written on a WORM
cartridge does not become compromised, for example:
• The format of an Ultrium 4 800 GB or Ultrium 3 400 GB WORM Tape Cartridge is
unlike that of standard read/write media. This unique format prevents a drive that
lacks WORM-capable firmware from writing on a WORM tape cartridge.
• When the drive senses a WORM cartridge, the firmware prohibits the changing or
altering of user data already written on the tape. The firmware keeps track of the
last appendable point on the tape.
WORM Media Errors
The following conditions cause WORM media errors to occur:
• Information in the servo manufacturer’s word (SMW) on the tape must match
information from the cartridge memory (CM) module in the cartridge. If it does not
match, a media Error Code 7 will post on the drive’s single-character display
(SCD). An error will also be displayed on the Operator Panel.
• Inserting a WORM tape cartridge into a drive that is not WORM capable causes the
cartridge to be treated as an unsupported medium. The drive will report a media
Error Code 7. Upgrading the drive firmware to the correct code level will resolve
the problem.
Requirements for WORM Capability
To add WORM capability to your LTO Ultrium generation 4 drive(s), you need to
have the drive firmware to the correct code level, and use either Ultrium 4 800 GB
WORM tape cartridges or Ultrium 3 400 GB WORM tape cartridges (see “Ordering
Media Supplies” on page 5-19).
Cleaning Cartridge
An IBM Ultrium Universal Cleaning Cartridge is required to clean the tape drive. The
drive itself determines when it needs to be cleaned and notifies the library. When
notified, the library indicates that the drive needs cleaning by turning ON the “Clean
Drive” LED on the front panel of the library and posting a message on the library
display.
A stand-alone tape drive requires manual insertion of the cleaning cartridge. A tape
drive within a library requires the use of a library menu function to either
automatically or manually clean the tape drive.