Quantum LTO 4, User Manual

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SCSI Commands: 44BSECURITY PROTOCOL OUT Page 195
3.32 SECURITY PROTOCOL OUT
The SECURITY PROTOCOL OUT command is used to send data to the logical unit.
The data sent specifies one or more operations to be performed by the logical unit.
The format and function of the operations depends on the contents of the
SECURITY
PROTOCOL
field. Depending on the protocol specified by the
SECURITY PROTOCOL
field, the application client may use the SECURITY PROTOCOL IN command to
retrieve data derived from these operations.
Any association between a SECURITY PROTOCOL OUT command and a
subsequent SECURITY PROTOCOL IN command depends on the protocol
specified by the
SECURITY PROTOCOL
field. Each protocol shall define whether:
a) The device server shall complete the command with GOOD status as
soon as it determines the data has been correctly received. An indication
that the data has been processed is obtained by sending a SECURITY
PROTOCOL IN command and receiving the results in the associated data
transfer; or
b) The device server shall complete the command with GOOD status only
after the data has been successfully processed and an associated
SECURITY PROTOCOL IN command is not required.
The format of the data transferred depends on the protocol specified by the
SECURITY PROTOCOL
field.
This command is only supported in LTO4 drives and later.
3.32.1 SECURITY PROTOCOL OUT Command Descriptor Block
Byte Bits
7 6 5 4 3 2 1 0
0 OPERATION CODE (B5h)
1 SECURITY PROTOCOL
2
3
SECURITY PROTOCOL SPECIFIC
4
INC_512
Reserved
5 Reserved
6 (MSB)
9
TRANSFER LENGTH
(LSB)
10 Reserved
11 Control
3.32.1.1 SECURITY PROTOCOL OUT Command Field Descriptions
Field Bytes Bits Description
OPERATION
CODE 0 The Operation Code for SECURITY PROTOCOL OUT is B5h.
SECURITY
PROTOCOL 1 20h = Tape data encryption