7. ATAPI Packet Command Specification
MODE SENSE
SONY AIT-1 Turbo drive SDX-470V series Ver.1.0
7-40
7.8.5.
Medium Partition Page 11h (for multi-partitioned tapes)
The drive supports the Medium Partition Page which has the following format:
Table 7-40: MODE PAGE Multi Partitioned Medium Partition (11h)
Bit
Byte
7 6 5 4 3 2 1 0
0
PS(0) Reserved
Page
Code
(11h)
1
Page Length (08h – 88h)
2
Maximum Additional Partitions
3
Additional Partitions Defined
4
FDP(0)
SDP (0)
IDP
PSUM (10b)
Reserved
5
Medium Format Recognition (03h)
6
Reserved
7
Reserved
8
(MSB)
9
Partition Size (Partition 0)
(LSB)
10
(MSB
11
Partition Size (Partition 1)
(LSB)
:
:
:
134
(MSB
135
Partition Size (Physical & Logical Partition 63)
(LSB)
Warning:
This page is used to format a tape to with one or two partitions. Extreme care must be used with this
parameter page to avoid accidental reformatting of the tape. Reformatting will destroy all existing data.
Maximum Additional Partitions:
This field is only valid for MODE SENSE, and it is used to report the maximum
number of additional partitions. This field is non-changeable; however it accepts all values as a don’t care. The
field value represents the maximum number of additional partitions supported, and it is limited by the free memory
available in MIC, as well as the AIT Format limit of 256 partitions. SDX-470V calculates how many partitions can
be created for the current media; for example, you can make up to 14 partitions with net total 13 bytes of the User
Volume Note and User Partition Notes when using 2Kbytes version of SDX1-25C.
Additional Partitions Defined:
This field specifies the number of additional partitions to be defined for the tape
based on the IDP bit. The maximum allowed is the value returned in the Maximum Additional Partitions field. The
drive the CHECK CONDITION status (ASC/ ASCQ = 83h/ 80h), when there is not enough room in the MIC.
FDP:
The Fixed Data Partitions bit is not supported by the drive and if set, a CHECK CONDITION status is
returned with an ILLEGAL REQUEST Sense Key set.
SDP:
The Select Data Partitions bit is not supported by the drive and if set, a CHECK CONDITION status is
returned with an ILLEGAL REQUEST Sense Key set.
IDP:
The Initiator Defined Partitions bit is supported and, when set to one, indicates that the tape shall be
partitioned based on the Additional Partitions Defined field, PSUM and Partition Size field.
