Dell Emulex Family of Adapters - Manual (Page 963)

Emulex Drivers Version 10.2 for Linux User Manual P010081-01A Rev. A
Appendix A. iSCSI Driver
963
Appendix A. iSCSI Driver
iSCSI Driver Parameter Descriptions
Table A-1 lists the user-configurable iSCSI driver parameters for the OCe10102 adapter.
It includes a description of the parameters, default values, and their configuration
value range.
Note: If the value provided for a parameter exceeds the parameter’s defined
minimum or maximum value, the driver logs an error in the event log, and
continues to load using the parameter’s default value.
Table A-1 iSCSI OCe10102 Driver Configuration Parameters
Parameter Description
ETO The Extended Timeout (ETO) parameter specifies the amount of time, in seconds,
that the initiator driver waits for the target to become available once it has lost the
connection to the target during an I/O operation.
The minimum value is 0. The maximum value is 3600. The default value is 30.
For more information, see “Configuring the ETO and LDTO Parameters” on page 964
and “Error Handling using ETO and LDTO Parameters” on page 966.
large_io The Large I/O (large_io) parameter specifies the maximum transfer size in a single
I/O request in KBs (1KB = 1024 bytes). By default, the OneConnect iSCSI driver
supports up to 128 KB of data in a single I/O request. When large_io is set to 512, then
up to 512 KB of data can be supported in a single I/O request.
The minimum value is 128 (default). The maximum, and only other, value is 512.
For more information see “Configuring the large_io Parameter” on page 964.
LDTO The Link Down Timeout (LDTO) parameter determines the amount of time, in
seconds, that the initiator driver waits for the controller's physical link to become
available before reporting that the LUNs are unavailable to the operating system.
The minimum value is 0. The maximum value is 3600. The default value is 20.
For more information, see “Configuring the ETO and LDTO Parameters” on page 964
and “Error Handling using ETO and LDTO Parameters” on page 966.
im_policy The Interrupt Moderation policy (im_policy) parameter specifies the rate of interrupts
for OneConnect adapters. The possible values are:
• 0 - disables the interrupt algorithm
• 1 - highest interrupt rate
• 2 - moderate interrupt rate (default)
• 3 - an interrupt rate between moderate and lowest
• 4 - lowest interrupt rate
For more information, see “Configuring the im_policy Parameter” on page 965.