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Certain records retention and data security applications require a Write Once, Read Many (WORM) method for storing data on tape.
The LTO Ultrium 4 and later drives enable WORM support when a WORM tape cartridge is loaded into the drive.
WORM media
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.
WORM media errors
Several conditions can cause WORM media errors to occur.
WORM requirements
You can add WORM capability to your IBM® Ultrium tape drive.
WORM media
The standard read/write media are incompatible with the WORM feature so a specially formatted WORM tape cartridge is required, see Figure 1 . 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. For
more information about how to choose and purchase the appropriate WORM tape cartridges for your tape drive, see
Ordering media supplies .
Figure 1. Ultrium Data and WORM Tape Cartridges
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:
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 9, native data capacity is 18 TB and compressed data capacity is 45 TB.
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
Several conditions can 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 posts on the drive's single-character display (SCD).
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 . Upgrading the drive firmware to the correct code level resolves the problem.
WORM requirements
You can add WORM capability to your IBM® Ultrium tape drive.
To add WORM capability to your IBM LTO Ultrium 9 drives, you must use IBM Ultrium 9 WORM tape cartridges (18 TB), or IBM Ultrium 8 tape cartridges (12 TB).
See
Ordering media supplies .
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 when the single-character display (SCD) flashes a . To clean the head manually, insert a
cleaning cartridge into the tape load compartment. See
Figure 1 . The drive completes the cleaning automatically. When the cleaning is finished, the drive ejects the
cartridge, and the SCD is blank.
Note: The drive automatically ejects an expired cleaning cartridge without running the cleaning process. Replace the expired cleaning cartridge with a new cleaning
cartridge and insert it into the drive.
114 IBM TS22xx Tape Drives