Q-Logic 2300 manual RIO Operation Modes

3 – QLA2342/2342L		￿
Fast!UTIL
Table 3-3. Extended Firmware Settings (Continued)
Setting	Options	Default
Interrupt Delay Timer	0–255	0
Data Rate	0, 1, 2	2

■Extended Control Block. This setting enables all other extended firmware settings. The default is Enabled.

■RIO Operation Mode. This setting specifies the reduced interrupt operation (RIO) modes, if supported by the software driver. RIO modes allow posting multiple command completions in a single interrupt (see table 3-4). The default is 0.

	Table 3-4. RIO Operation Modes
Option	Operation Mode
0	No multiple responses
1	Multiple responses, 16-bit handles, interrupt host
2	Multiple responses, 32-bit handles, interrupt host
3	Multiple responses, 16-bit handles, delay host interrupt
4	Multiple responses, 32-bit handles, delay host interrupt

■Connection Options. This setting defines the type of connection (loop or point-to-point) or connection preference (see table 3-5). The default is 2.

Table 3-5. Connection Options

Option Type of Connection

0Loop only

1Point-to-point only

2Loop preferred, otherwise point-to-point

■Class 2 Service. This setting enables Class 2 service parameters to be provided during all automatic logins (loop ports). The default is Disabled.

■ACK0. This setting determines the type of ACK used. When this setting is Enabled, sequence ACK is used. When this setting is Disabled, frame ACK is used. The default is Disabled.

NOTE: The Class 2 Service setting must be Enabled to use the ACK0 setting.

■Fibre Channel Tape Support. This setting enables FCP-2 recovery. The default is Enabled.

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