IBM 59P5712 Table 3. Extended firmwaresettings, Table 4. RIO operationmodes

Extended control block: Enables all other extended firmware settings. The
default is Enabled.
RIO operation mode: Specifies the reduced interrupt operation (RIO) modes,
if supported by the software device driver. RIO modes enable posting multiple
command completions in a single interrupt (see Table 4). The default is 0.
Connection options: Defines the type of connection (loop or point-to-point) or
connection preference (see Table 5 on page 28). The default is 3.
Table 3. Extended firmwaresettings
Setting Options Default
Extended control block Enabled or Disabled Enabled
RIO operation mode 0, 1, 2, 3, 4 0
Connection options 0, 1, 2, 3 3
NonParticipating hard ID Enabled or Disabled Disabled
Class 2 service Enabled or Disabled Disabled
ACK0 Enabled or Disabled Disabled
Fibre Channel tape support Enabled or Disabled Disabled
Fibre Channel confirm Enabled or Disabled Disabled
Command reference
number
Enabled or Disabled Disabled
Read transfer ready Enabled or Disabled Disabled
Response timer 0–255 0
Interrupt delay timer 0–255 0
Table 4. RIO operationmodes
Option Operation mode
0No multiple responses
1Multiple responses, 16-bit handles, interrupt host
2Multiple responses, 32-bit handles, interrupt host
3Multiple responses, 16-bit handles, delay host interrupt
4Multiple responses, 32-bit handles, delay host interrupt
Appendix A. Fast!UTIL 27