Read Block Limits Command; Table 3-107 Read Block Limits Command; Table 3-108 Read Block Limits Data - Oracle StorageTek T10000 Reference Manual

Read Block Limits Command

The Read Block Limits command establishes the longest and shortest record size
supported by the tape drive. This command returns six bytes of data.
• When the DIV feature is not enabled the Maximum Block Length reported by the
Read Block Limits command is 2,097,152 bytes.
• When the DIV feature is enabled the Maximum Block Length reported by the
Read Block Limits command is increased by 4 bytes to account for the extra bytes
of PI data (2,097,156 bytes).

TABLE 3-107 Read Block Limits Command

Byte 7
0
1 (MSB)
thru
4
5
Read Block Limits Data

TABLE 3-108 Read Block Limits Data

Byte 7
0
1 (MSB)
thru
3
4 (MSB)
thru
5
Parameter
Granularity
Maximum block length
Minimum block length
August 2016
6 5
Operation Code (05h)
6 5
Reserved
Maximum Block Length
Minimum Block Length
Value
0
2,097,152 bytes (standard)
2,097,156 bytes (with the DIV feature)
1 byte
Bit
4 3 2
Reserved
Control Byte
Bit
4 3 2
Granularity
Read Block Limits Command
1 0
(LSB)
1 0
(LSB)
(LSB)
Commands 155