Sony SDX-700C, Product Specifications Manual

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MODE SELSECT 6.Command Specification
SONY AIT-3 drive SDX-700 series Ver.2.1 6-51
6.7.6. Medium Partitions Parameter Page(for multi-partitioned tapes) (11h)
The Medium Partitions Parameter Page supported by the drive has the following format:
Table 6-40: Medium Partitions Parameter Page(for multi-partitioned tapes)
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 (1) PSUM (10b) Reserved
5 Medium Format Recognition (03h)
6 Reserved
7 Reserved
8 (MSB) Partition Size (Partition 0)
9 (LSB)
10 (MSB) Partition Size (Partition 1)
11 (LSB)
:
:
:
134 (MSB) Partition Size (Physical & Logical Partition 63)
135 (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-700C calculates how many partitions can be
created for the current SDX1-25C 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.
The SDX-700C operating in the AIT Format Mode allows tapes to be split into separate and independent partitions,
each with its own Reference, System and Vendor Group areas. The maximum size of a partition may be the entire
tape. A tape partitioned into several partitions may be considered a collection of several separate logical tapes. This
is illustrated below: