Appendix C — Specifications Tape Drive and Media Specifications
December 2019 User Guide—Spectra T200, T380, and T680 Libraries
552
Printed Characters The label can have human-readable alphanumeric
characters printed along the top or bottom edge of the label provided there
is no conflict or interference with the automation code. This text must
include the barcode data, but can also include additional text. The format
and colors of the human readable characters is up to the customer and
label vendor. For location restrictions, see Detailed Specifications for LTO
Cartridge Barcodes on page 553 and Detailed Specifications for TS11xx
Technology Cartridge Barcodes on page 555.
Note: When using barcode labels with alphanumeric characters along
the bottom edge, the label must be positioned so that barcode is
at least 13.72 mm below the top edge of the cartridge to ensure
that the barcode reader can read the label.
Barcode Data The library supports barcode data strings consisting of from
1 to 16 characters, including an optional checksum character. Quiet zones
precede and follow the start and stop characters.
The barcode data string on standard Spectra Logic barcode labels consists
of a start character, eight alphanumeric characters, a checksum character,
and the stop character. Quiet zones precede and follow the start and stop
characters.
The first six (6) characters following the start character can be any
combination of upper case A-Z or 0-9 (for example, ABC123) to identify
the cartridge Volume Serial Number. The use of “CLN” and
“DG{space}” at the beginning of the volume identifier is reserved.
The volume identifier “CLNvnn” is reserved for cleaning cartridges.
When a drive requires cleaning, it requests a specific type of
cleaning cartridge.
The “v” field is an alphanumeric field to identify cleaning
cartridge applications, “U” for Universal Cleaning Cartridges or
a drive unique identifier.
The “nn” alphanumeric field is used to track individual cleaning
cartridge activity (that is, usage and life).
The volume identifier “DG{space}vnn” is reserved for diagnostic
and service cartridges.
The last two (2) characters are the media identifier and indicate the
cartridge Media Type (for example, “L” for LTO and “4” for an LTO-4
cartridge or JC for a TS11xx technology JC cartridge). In IBM LTO tape
drives, the value of the media identifier on cleaning cartridges is
ignored, although a valid value must be present.
The barcode string can be printed in either direction on the label and
must begin and end with a valid start/stop character (
*
).
The label must be printed so that barcode data is positioned along the
edge of the label that will be closest to the hub side of the cartridge.
The AIM Uniform Symbol USS-39 specification provides detailed
information about the format of the start character, the series of characters
that make up the barcode data, the optional checksum character, and the
stop character.
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