Sony SDX-700C Product Specifications Manual page 202

14. Appendix G
Partition Size Descriptor:
Partition size in megabytes, in binary notation. Bytes 8, 9: Partition Size Descriptor. For a Mode Sense
Command, the value in this field is invalid unless the Mode Sense Command follows a successful Mode Select
Command Page 32. Therefore, on power-up without a Mode Select Page 32h, the Current Page 32h Partition
Size Descriptor should be set to the default value of 00 00. There is no relation between this field and the IDP bit
in the parameter block of Mode Select Page 11h.
Append Partition example procedure:
Start
⇓
Mode Sense Page 11h
⇓
Can I create one more new
partition?
⇓
Log Sense
(Page 3Dh; PC 0016h)
⇓
Go to the Last Partition
⇓
Mode Select Page 32h
⇓
Stop
Note 1: The partition to be appended inherits the conditions previously set by the Mode Select Page 31h.
Note 2: Example 1: (In case of the SDX1-25C cassette)
This example does not contains formatting overhead. AIT mode tape with two partitions. P0 = 2 GB, P1 =
23 G. P1 contains 4 GB of old data. Mode Select Page 32h Append Partition Page indicates 1 GB for the
partition size. After the Mode Select command returns Good status we have the following:
P0 = 2GB
P1 = 4 GB (old data) + 1 GB of Append space = 5 GB <--- new append partition
P2 = 23 GB - 5 GB = 18 GB.
After this command completes Unit Attention condition will be set for other Initiators, with ASC/ASCQ set
to 2A01, Mode Parameters changed. After this command Mode Sense page 11h will show the following:
Additional Partition = 2
P0 = 2GB
P1 = 5 GB
P2 = 18 GB
14-6
Check Max Additional Partitions
IF (Max Additional Partitions) ≥ 1
THEN you can create a new partition.
Yes
Get Last Partition Number
Change Partition.
Append partition.
SONY AIT-3 drive SDX-700 series Ver.2.1