WORM media
Because standard read/write media are incompatible with the WORM feature, a specially formatted
WORM tape cartridge (see Figure 12) is required. Each WORM cartridge has a unique, worldwide
cartridge identifier (WWCID), which comprises the unique CM chip serial number and the unique tape
media serial number. Ultrium 8 WORM cartridges are burgundy and silvery gray. For more information
about how to choose and purchase the appropriate WORM tape cartridges for your tape drive, see
“Ordering media supplies” on page 54.
Data security on WORM media
Certain built-in security measures help ensure that the data that is written on a WORM cartridge does
not become compromised. For example:
v The format of an Ultrium WORM Tape Cartridge is not the same as the standard read/write media.
This unique format prevents a drive that lacks WORM-capable firmware from writing on a WORM
tape cartridge. For LTO 8, native data capacity is 12000 GB and compressed data capacity is 30000 GB.
v When the drive senses a WORM cartridge, the firmware prohibits the changing or altering of user data
that is already written on the tape. The firmware notes the last point on the tape that can be appended.
WORM media errors
The following conditions cause WORM media errors to occur:
v 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 posts on
the drive 's single-character display (SCD).
v Inserting a WORM tape cartridge into a drive that is not compatible with WORM causes the cartridge
to be treated as an unsupported medium. The drive reports a media Error Code 7. Upgrading the drive
firmware to the correct code level resolves the problem.
WORM requirements
To add WORM capability to your IBM LTO Ultrium 8 drives, you must use either IBM Ultrium 8 12000
GB WORM tape cartridges or IBM Ultrium 7 6000 GB WORM tape cartridges. See “Ordering media
supplies” on page 54.
Cleaning cartridge
A specially labeled IBM LTO Ultrium Cleaning Cartridge is used to clean the drive head. The drive itself
determines when a head must be cleaned. It alerts you by the SCD flashing a
. To clean the head
manually, insert a cleaning cartridge into the tape load compartment (see Figure 7 on page 18). The drive
completes the cleaning automatically. When the cleaning is finished, the drive ejects the cartridge, and the
SCD is blank.
Figure 12. Ultrium Data and WORM Tape Cartridges
40 IBM TS2280: Setup, Operator, and Service Guide Machine Type 3580 Model H8S
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