Changes to system registry to optimize the initiator for the Lenovo Storage V7000 system

You can change the system registry to optimize the iSCSI operation.

For reliable iSCSI operation during system maintenance, you can update these values in the system registry. See Table 1. In addition, you can also update the system registry to change the delayed acknowledgment settings to address slow performance with iSCSI operations between systems. For details, see the section "Addressing Slow Performance with iSCSI clusters" in the http://download.microsoft.com/download/A/E/9/AE91DEA1-66D9-417C-ADE4-92D824B871AF/uGuide.doc.

Table 1. System registry
Registry key	Type	Value (decimal)
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E97B-E325-11CE-BFC1-08002BE10318}\`bus id`\Parameters\LinkDownTime	DWORD	120
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E97B-E325-11CE-BFC1-08002BE10318}\`bus id`\Parameters\MaxRequestHoldTime	DWORD	120
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Disk\TimeOutValue	DWORD	60
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E97B-E325-11CE-BFC1-08002BE10318}\`bus id`\Parameters\ MaxPendingRequests	DWORD	2048

Note: You must restart the computer for these changes to take effect.