Quantum 3.5 When you choose Allow I/O Timouts, this, Option controls the I/O retry behavior. This

	Chapter 4 Configuring StorNext
	Windows Configuration Utilities
Field / Button	Description
I/O Retry Time	When you choose Allow I/O Timouts, this
Seconds	option controls the I/O retry behavior. This
	parameter establishes the amount of time that
	may elapse during an I/O retry sequence.
	An I/O retry sequence consists of the
	following:
	• Retry an I/O request across all available
	paths that are currently present.
	• Compare the current time to the
	Instantiation time of the I/O request, if at
	least <n> seconds have elapsed, return the
	I/O request in error, otherwise reset the
	paths used, and retry again.
I/O Penalty TIme	This option controls the Multi-Path I/O
Seconds	penalty value, where <n> is expressed in
	seconds with a minimum value of 1 and a
	maximum value of 15.
	This parameter establishes the amount of time
	a Path_In_Error will be bypassed in favor of
	an Operational Path during a Multi-Path
	selection sequence. If all paths are currently in
	the Path_In_Error state, the first available
	path will be selected, independent of the
	Path_In_Error state.
	The default value is 5 seconds.
Fast Failover	When this box is checked, the client uses a
Detection	more aggressive approach to detecting if the
	FSM has failed. With this option on, the client
	monitors the FSM heartbeat. If no heartbeat is
	detected within three (3) seconds, a failover
	request is initiated.
	This option is desirable for near realtime
	activities that cannot sustain more than 10
	seconds of access loss to the server. Quantum
	does not recommend enabling this option for
	normal file system operations.

StorNext 3.5 Installation Guide 78