Appendix C — Specifications Tape Drive and Media Specifications
December 2019 User Guide—Spectra T200, T380, and T680 Libraries
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WORM Media
Certain records retention and data security applications require a Write
Once, Read Many (WORM) method for storing data on tape. LTO-3 and
later generation drives and TS11xx technology drives enable WORM
support when a WORM tape cartridge is loaded into the drive.
WORM Media Requirements Because standard read/write media are
incompatible with the WORM feature, a specially formatted WORM tape
cartridge 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.
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 a 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.
Cleaning Cartridges
Cleaning cartridges are valid for 50 uses. Do not rewind and reuse the material
in a cleaning cartridge. Reusing the material may redistribute contaminants
previously removed from the tape path. If all of the cleaning material has been
used, discard the cartridge and use a new cleaning cartridge.
Barcode Label Specifications
Symbology The barcode labeling scheme used on Spectra Logic certified
media uses the barcode symbology of USS-39. You can obtain a complete
description and definition of this symbology from the Automatic Identification
Manufacturers (AIM) specification, the Uniform Symbol Specification (USS-39),
and the ANSI MH10.8M-1993 ANSI Barcode specification.
Application and Orientation The barcode label must be applied to the
cartridge so that it fits within the label recess on the edge of the cartridge
without curling up on the sides or ends. The label must be oriented so that the
barcode characters are along the edge closest to the hub side of the cartridge.
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