Sony SDX-700C, Product Specifications Manual

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13. Appendix F
SONY AIT-3 drive SDX-700 series Ver.2.1
13-3
13.8.
EXAMPLE SCSI COMMAND SEQUENCE FOR MIC
13.8.1. How to Create User Notes in AIT-3 MIC
The phrase “User Note” includes both User Volume Note and User Partition Note. User Notes are all variable in size
from 1 byte up to the available user memory size. SDX-700C generates error (illegal parameter list length), if the
User Volume Note Data Size or the User Partition Notes are ZERO.
The following is the data structure for the User Volume Note:
Header Information
←
8 bytes of memory management information
User Data
This is the data structure for User Partition Note:
Header Information ← 10 bytes of memory management information
User Data
The drive manages the User Volume Note Header and User Partition Note Headers. These operations are
transparent to the user. When the drive reports the MIC free memory capacity (MIC free byte count) through Log
Sense Page 3Dh Parameter Code 0003h, it includes the Header count. The user may use this information to write
the entire MIC. For example, if MIC free byte count is 100, the user, on the next Log Select command, may write the
entire MIC with this value to either the MIC User Volume Note or MIC User Partition Note area. The free byte count
following this command will be ZERO. The user cannot write another Note area, or to rewrite the same Note area
with a larger data length. However, the user is allowed to rewrite to this same Note area with the same amount of
data; if the Note area is the last one within the User Note Area, it can be rewritten with a smaller amount of data as
well.
The example of writing MIC follows. The free byte count is read with the Log Sense Page 3Dh Parameter Code
0003h.