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7 – SANblade Control iX
Changing the Firmware Configuration Parameters
7-18 IS0053301-00 D
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5. Select and change the desired parameters, explained in the following
paragraphs. To view the full name of the parameter, point the mouse to the
parameter column. When you are done changing the parameters, click OK.
The following message displays:
Figure 7-18. Save Firmware Parameters Message
❑ Snack. When this check box is set and the firmware is configured as an
initiator, the QLA40xx firmware sends SNACK requests to the target when
it detects missing PDUs. When this check box is cleared and the firmware
is configured as an initiator, the firmware aborts the command and/or
closes the connection when missing PDUs are detected.
❑ Initial R2T. When this check box is selected, the QLA40xx HBA negotiates
(during login phase) for InitialR2T=yes. When this check box is cleared,
initial R2T is disabled and the QLA40xx HBA negotiates for InitialR2T=no.
❑ Immediate Data. When this check box is selected, the QLA40xx firmware
negotiates (during login phase) for Immediate Data=yes. When this check
box is cleared, immediate data is disabled and the firmware negotiates for
ImmediateData=no.
❑ Execution Throttle. This column specifies the execution throttle value.
The execution throttle is used by the QLA40xx firmware to limit the number
of concurrently executing commands. Valid values are in the
range 0–65535.
In target mode, this column is used by the QLA40xx to determine the
MaxCmdSN (maximum command sequence number) to report to an
initiator during a logged in iSCSI session.
In initiator mode, when this value is nonzero, the firmware limits the number
of outstanding commands to the smaller of this value and the number of
commands advertised by the target's MaxCmdSN value.
❑ Device Timeout. When this check box is selected, the QLA40xx firmware
ignores the IOCB command timeout values specified by the host.
❑ Suspend Task on Firmware Error. When this check box is selected, the
QLA40xx suspends the firmware when an unrecoverable error is detected
instead of automatically restarting the QLA40xx. This bit is used for
debugging purposes.