Event viewer on a Windows Server 2008 R2 lists an error message Event ID 4025, Source EqualLogic.

Error message is “iSCSI error 0x490 when connecting to vss-control volume for group”.

Server is using an iSCSI volume on a Dell EQL storage array. Dell EqualLogic Auto-Shapshot Manager software is installed on the server. In addition, server has 4 NICs, two of which are connected to the data network (LAN) and are using IPs from the 192.x.x.x/24 subnet, the other two connected to the storage network (SAN) and are using IPs from the 10.x.x.x/24 subnet.

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Start the ASM software, then navigate to Settings and click on the MPIO Settings tab on the left.

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In the Network Connections section highlight the subnet that corresponds to the data network (10.x.x.x/24) and click on Exclude.

Start the EqualLogic PS Group Manager and highlight Group Configuration. On the right hand side, click on the VDS/VSS tab.

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Click on the Add button in the upper right corner of the VDS/VSS Access Control List window. A new window will pop up.

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In the Create access control record window, check the box next to Limit access to iSCSI initiator name and enter in the iSCSI initiator name.

This entry will allow this particular iSCSI initiator on your Windows server access to the VSS control volume.

Back on the Windows server click on the Start button, then locate iSCSI Initiator under All Programs > Administrative Tools. In the iSCSI Initiator Properties window click on the Targets tab, then click on the Refresh button. Notice that a new Discovered Target will appear. This is the VSS control volume we’ve just granted this server access to. In addition, notice that the status for this newly discovered target is Inactive.

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Highlight the volume and press the Connect button. A Connect to Target window will pop up. Check the box next to Enable multi-path and then click on the OK button.

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