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SONY SDT-10000/SDT-11000 DDS Tape Drive
6. COMMAND SPECIFICATION
CAF:
The Change Active Format bit, set to one, indicates that the active format is to be changed to that set in the Active
Format Field.
Active Format:
The definition of this field is DAT specific. This field is used to enable DDS format options and is described below:
4
3
2
1
0
Disable RAW
ECC-3
N-Group
Table 6-31: Active Format
Disable RAW:
This bit is used to enable or disable the use of Read-After-Write error detection. If this bit is NOT set, RAW is
enabled. This is the drive’s default configuration.
ECC-3:
This bit is used to enable or disable the use of Third Level Error Correction (ECC-3). If this bit is set, ECC-3 is
enabled. This is the drive’s default configuration.
N-Group:
The value of this field indicates the number of times a group will repeatedly be written to tape. The default is zero
repetitions. This feature may be used to performance match the drive with the Host. A decode of the field is shown
below:
This field will not be used on DDS-3 and DDS-4.
2
1
0
Number of Repetitions
0
0
0
0 (Default)
0
0
1
1
0
1
0
2
0
1
1
3
1
0
0
4
1
0
1
5
1
1
0
6
1
1
1
7
Table 6-32: N-Group field values
Active Partition:
Indicates the current logical partition number in use on the medium.
The partition number may be either partition 0 or 1. Setting this field to any other values will be rejected by the drive
with a CHECK CONDITION status and the ILLEGAL REQUEST sense key set.
MODE SELECT
Summary of Contents for DDS-4
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