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Windows iSCSI IO downtime comparision between LIF down and SFO

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I have a question of the Windows iSCSI IO downtime.

 

Host: Windows Server 2008

Filer: cDOT 831

 

When I take the LIF down, the IO downtime in the Windows host is 15s, which defined by the LinkDownTime regedit option.

When I takeover the node which the LUN locates, the IO downtime is less than 1s. Is it the normal behavior? Why the SFO's downtime is so short.

 

Thanks for the help!


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