Sony DDS-4 Product Description Manual page 123

6. COMMAND SPECIFICATION
Bits Per MM:
This field indicates the number of bits per millimeter per track as recorded on the medium. The value in this field
shall be rounded up if the fractional value of the actual value is greater than or equal to 0.5. A value of 00h indicates
that the number of bits per millimeter does not apply to this logical unit. Direct of this value between different
suppliers (possible products) is discouraged since the definition of bits may vary.
Media Width:
This field indicates the width of the medium supported by this density. This field has units of tenths of millimeters.
The value in this field of equal to 0.5. The Media Width field may vary for a given density depending on the
mounted medium. A value of 00h indicates that the width of the medium does not apply to this logical unit.
Tracks:
This field indicates the number of data tracks supported on medium by this density.
Capacity:
If MEDIA bit of CDB is set to 0, this field shall indicates the approximate capacity of the longest supported medium
assuming recording in this density with one partition. If the Media bit of CDB is set to 0, set to 0m this field should
indicate the approximate capacity of the current medium assuming recording in this density with one partition. If the
approximate capacity of the current medium cannot be determined for the mounted medium, the longest supported
medium capacity shall be used. The data and block size assumes that compression is disabled. The capacity also
assumes that the media is in "good" condition, and that "normal" data and block size are used. This value is in units
of megabytes (10000000 bytes). The logical unit does not guarantee that this space is actually available in all cases.
6 - 72 SONY SDT-10000/SDT-11000 DDS Tape Drive
REPORT DENSITY SUPPORT