Datasheet

Command Specifications
4-24 C141-C008
Table 4.13 MODE SELECT parameters
Parameter Byte Length
Header 4
Block Descriptor 8 or 0
Page Descriptor Page 1: Read/Write Error Recovery Parameter 8 or 12
Page 2 Disconnect/Reconnect Parameter 12 or 16
Page 3: Format Parameter 24
Page 4: Drive Parameter 20 or 24
Page 7: Verify Error Recovery Parameter 12
Page 8: Caching Parameter 20
Page A: Control Mode Parameter 12
Page C: Notch Parameter 24
Page 19: Fibre Channel Control Parameter 16
Page 1C: Information Exception Control Parameter 12
Page 21: Additional Error Recovery Parameter 4
1) The MODE SELECT parameter is ordinarily different in its
configuration depending on the input/output device and the
type of controller. It is also possible that current definitions
may be expanded in accordance with the expansion of the
functions of the IDD in the future. In order to assure
independence of software from the individual specifications of
input/output devices, before the INIT issues this command, it
should follow the procedure of using the MODE SENSE and
MODE SENSE EXTENDED command to determine the types
of parameters the TARG is actually equipped with and the
attributes of those parameters, such as whether or not they can
be changed.
2) After changing anything in the "Block descriptor," "Format
parameters (Page 3)" or "Drive parameters (Page 4)," with the
MODE SELECT or MODE SELECT EXTENDED command,
it is impossible to execute a command to access the data on the
disk media until execution of the FORMAT UNIT command is
completed, and a CHECK CONDITION status (MEDIUM
ERROR [=3] / Medium format corrupted [=31-00]) is reported
for all such commands.
The configuration and functions of the "Page descriptors" supported by the IDD
are described below.