Dell Compellent Series 40 - Manual (Page 430)

422 Storage Center 5.5 System Manager User Guide
Server HBA Settings
Windows Settings
Refer to Microsoft documentation for complete details on changing registry values for the
iSCSI initiator:
http://blogs.msdn.com/b/san/archive/2008/07/27/microsoft-iscsi-software-initiator-isns-
server-timers-quick-reference.aspx for details.
Time Out
In regedit, make the following change:
H_Key_Local_Machine
->System
->CurrentControlSet
->Services
->disk -> Timeout Value=60
MaxRequestHoldTime and LinkDownTime Settings
MPIO not enabled
When using a Microsoft 2008 R2 iSCSI initiator with a 10G iSCSI card, you should set the
MaxRequestHoldTime to 120 to prevent loss of host connectivity during controller failover.
In regedit, make the following change:
H_Key_Local_Machine
->System
->CurrentControlSet
->Control
->Class
->{4D36E97B-E325-11CE-BFC1-08002BE10318}
-><Instance Number>
(which is the storage controller instance of the MS iSCSI Initiator)
->Parameters->MaxRequestHoldTime=120
MPIO enabled
When using a Microsoft 2008 R2 iSCSI initiator with MPIO enabled, LinkDownTime should
be set to 120 to prevent loss of host connectivity during controller failover.
In regedit, make the following change:
H_Key_Local_Machine