User Manual

SCSI Commands Reference Manual, Rev. J 188
www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)
NOMINAL COMMAND PROCESSING TIMEOUT field
A non-zero value in the NOMINAL COMMAND PROCESSING TIMEOUT field indicates the minimum amount of time in seconds the application
client should wait prior to querying for the progress of the command identified by the parameter data that contains this command timeouts
descriptor. A value of zero in the NOMINAL COMMAND PROCESSING TIMEOUT field indicates that no timeout is indicated.
NOTE The value contained in the NOMINAL COMMAND PROCESSING TIMEOUT field may include time
required for typical device error recovery procedures expected to occur on a regular basis.
RECOMMENDED COMMAND TIMEOUT field
A non-zero value in the RECOMMENDED COMMAND TIMEOUT field specifies the recommended time in seconds the application client should
wait prior to timing out the command identified by the parameter data that contains this command timeouts descriptor. A value of zero in the
RECOMMENDED COMMAND TIMEOUT field indicates that no time is indicated.
The device server should set the recommended command timeout to a value greater than or equal to the nominal command processing time-
out.
3.34.4.2 WRITE BUFFER command timeouts descriptor COMMAND SPECIFIC field usage
For the WRITE BUFFER command, the COMMAND SPECIFIC field usage is reserved for all modes except the following:
a) Download microcode mode (04h);
b) Download microcode and save mode (05h);
c) Download microcode with offsets mode (06h);
d) Download microcode with offsets and save mode (07h);
e) Download microcode with offsets and defer activation mode (0Eh) only if the microcode is activated by an event other
than an activate deferred microcode mode; and
f) Activate deferred microcode mode (0Fh).
If the command timeouts descriptor describes one of the WRITE BUFFER modes listed in this subclause, then the COMMAND
SPECIFIC field indicates the maximum time, in one second increments, that access to the SCSI device is limited or not possible
through any SCSI ports associated with a logical unit that processes a WRITE BUFFER command that specifies one of the named
modes. A value of zero in the COMMAND SPECIFIC field indicates that the no maximum time is indicated.