14. Appendix F
SONY AIT-1 Turbo drive SDX-470V series Ver.1.0
14-3
The overhead for User Volume Note is 10 bytes.
The overhead for an User Partition Note is 12 bytes.
User Volume Note shall be created
before any User Partition Note. User
Volume Note cannot be deleted, cannot
be expanded and cannot be shrinked
except initializing time.
- Give 6,560 bytes of pure user data for User Volume Note.
- Give 2 partitions.
- No User Partition Note.
Super High Speed Search MAP (480Bytes)
User Volume Note (6,560 Bytes)
System Log for Partition #1 (64Bytes)
System Log for Partition #0 (64Bytes)
Accumulative System Log
Manufacturer Information,
Memory Management Information,
Cassette Serial Number,
etc.
6,688 Bytes (in case of the 64kbits contact type of MIC)
HEADER (1024Bytes)
Figure F-3: An possible AIT-E TURBO, AIT-1 TURBO contact type of MIC layout for a two partition tape
14.2.
Functional Benefits
The information maintained within MIC can be used to provide various tape sub-system benefits to users. In this
section we discuss the following features available with MIC cartridges and SDX-470V drives: fast load/unload,
super high speed search, and data integrity and media management.
14.2.1.
Fast Media Load/Unload
The System Log information stored in the MIC and shown in Figure F-3 does not need to be duplicated on tape and
is available to the drive while threading or unthreading the tape. Using MIC, the drive can write the System Log
information in as little as 10 milliseconds compared to 13 seconds needed without MIC (see Figure F-4). Figure F-4
illustrates the process used to accelerate the media unload after a write operation. Figure F-5 illustrates the process
used to accelerate media load operation. The System Log information update to tape is skipped when MIC cartridge
is used.
Note:
The values shown in the figures below are approximated and are not part of the specification.
