Exabyte 1X7 LTO 130, Tape Cartridge Case Color Native Data Capacity, Data Security on Worm Media

APPENDIX B—WRITE ONCE, READ MANY (WORM) CAPABILITY

Table B-1lists WORM media specifications.

Table B-1WORM tape cartridge specifications

Tape Cartridge	Case Color	Native Data Capacity
Ultrium 3 WORM	Two toned colored cartridgea	400 GB (800 GB at 2:1 compression)

aThe two-toned coloring allows you to easily distinguish WORM cartridges from Write/Read cartridges.

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 IBM 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 LTO-3 tape 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, the tape drive will report a Media Error code.

If your backup application or operating system returns SCSI sense information, the Sense information will be Sense Key (03) Medium error.

Inserting a WORM tape cartridge into a tape drive that is not compatible with WORM causes the cartridge to be treated as an unsupported medium. The tape drive will report a media Error Code 7.

Only LTO-3 tape drives have WORM capability. Inserting a WORM cartridge into an LTO-2 or an LTO-1 tape drive will produce the above error.

If you are using an LTO-3 tape drive and receive the above error, upgrading your LTO-3 tape drive’s firmware to the correct code level will resolve the problem. The firmware must be at version 54xx or higher and is available as a free download at www.exabyte.com/downloads.

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PRODUCT MANUAL 1012581