HP SureStore E SAN Manager LUN Management Administrator's Guide

Registry Values for Customizing SAN Manager LM 187
Advanced SAN
Administration
Note The Following Registry Settings Apply to the HP SAN Manager LM QLogic HBA driver
ONLY.
Path:
Value Name:
Value Type:
Implicit Default:
Purpose:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\trqladrv\Parameters
DeviceMissingDelay
REG_DWORD
30 (decimal)
Time in seconds to wait for a missing device to return. I/O for the device will be held
until this timer expires or the device returns. If using CLARiiON’s ATF (or similar
software) set to a low value to reduce fail-over delay. Range 0 – 256 seconds.
Path:
Value Name:
Value Type:
Implicit Default:
Purpose:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\trqladrv\Parameters
ExecutionThrottle
REG_DWORD
No limit. FFFF (hexadecimal) or 65535 (decimal)
Maximum number of I/O operations allowed outstanding, at once, to a particular LUN.
A value of FFFF hex disables the firmware limit. If devices become saturated with I/O,
reduce this value.
Path:
Value Name:
Value Type:
Implicit Default:
Purpose:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\trqladrv\Parameters
TimeoutBehavior
REG_DWORD
3
Controls how the HBA driver manages the timeout of commands sent to the HBA.
Timeout means a command, which has not completed after a certain period of time, is
failed.
Values:
– 0: Always use the MinimumTimeout value as the timeout period.
– 1: Use the time specified by a higher-level driver.
– 2: Never time out commands. This may cause programs to hang if a device fails to
complete a command, or if the network is unreliable.
– 3: Use the time specified by a higher-level driver, unless it is shorter than the time
specified by the MinimumTimeout value, in which case that value is used.
Table 6 Registry Values for Customizing SAN Manager LM (cont’d)