Control Byte - Oracle StorageTek T10000 Reference Manual

Command Descriptor Block

Control Byte

The control byte is the last byte of every Command Descriptor Block and has the
following structure:
TABLE 3-6 Control Byte
Byte 7
5/9/11/ Vendor-specific
15
Parameter
Vendor-specific
Flag bit
Link bit
42 T10000: Interface Reference Manual
6 5 4
Value
These bits provide specific information about the device
(shall be zero).
The flag bit causes an interrupt in the initiator between linked
commands allowing the device to respond with Intermediate
status (shall be zero).
The link bit allows the initiator to "link" or continue I/O
process and allows devices that support command linking to
indicate to the initiator the command was accepted by
returning Intermediate status to the initiator (shall be zero).
Bit
3 2
Reserved
1 0
Flag Link
August 2016