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SONY SDT-10000/SDT-11000 DDS Tape Drive
6. COMMAND SPECIFICATION
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. Setting of this bit is only valid at
BOM, otherwise the drive will return a CHECK CONDITION status with an ILLEGAL REQUEST Sense Key set.
The DDS format allows the tape to be split into two entirely separate and independent partitions. Each partition will
have its own Reference, System and Vendor Group area. Each partition will have a minimum size of 2541 frames. The
maximum size of a partition will be the whole tape. The partitions may exist together or the entire tape may be treated
as a single partition. This is illustrated below:
BOM = Beginning-of-Media
(Physical)
BOT = Beginning-of-Tape
(Logical)
EOM = End-of-Media
(Physical)
EOP =
End-of-Partition
(Logical)
EOT =
End-of-Tape
(Logical)
Note: The System area consists of three sub-sections:
Reference Area
System Area
Vendor Group
Figure 6-1: Tape Partition Layout
MODE SELECT
Device Area
System Area
End of Data
User Data Area
BOM
BOT
EOP/EOM
Partition 0
EOT
Single Partition Tape
Device Area
System
Area
End of
Data
User Data Area
BOM
BOT
EOP/EOM
Partition 0
EOT
Two Partition Tape
Partition 1
End of
Data
System
Area
User Data Area
EOT
EOP/BOP
Summary of Contents for DDS-4
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