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42 C3662M (6/08)
ISOLATING STORAGE UNITS ON A PRIVATE NETWORK
In some installations, you can isolate components of a DS system on a private network. The Server and VAUs must be accessible to client
machines and cannot be isolated. However, storage components such as VSAN Servers and VSAN units can exist on a private network. Isolated
components must be assigned private unique IP addresses for the subnet.
To isolate the storage units, complete the following steps on each unit:
1. On the Desktop, right-click My Network Places and select Properties.
2. Right-click Local Area Connection and select Properties.
3. Select Internet Protocol (TCP/IP) and click Properties.
4. Enter the following information:
IP address: 192.168.x.x (where “x” is any value from 0 to 255)
Subnet mask: 255.255.0.0
Leave the Default Gateway and DNS information blank.
5. Click OK.
To isolate storage units, you must also configure the other DS components to communicate with them on the private network. To do this,
complete the following steps on the Server and VAUs:
1. On the Desktop, right-click My Network Places and select Properties.
2. Right-click Local Area Connection and select Properties.
3. Select Internet Protocol (TCP/IP) and click Properties. The primary network IP address appears on the General tab in the Internet Protocol
(TCP/IP) Properties window; you do not need to change this.
4. To configure the private network, click Advanced.
5. On the IP Settings tab, click Add under IP Addresses.
6. Enter the following information to create a unique private IP address for this component:
IP address: 192.168.x.x (where “x” is any value from 0 to 255)
Subnet mask: 255.255.0.0
7. In Windows Explorer, open c:\winnt\system32\drivers\etc\hosts using Notepad. Add the private IP addresses and computer names of the
storage units, as determined in the previous procedure. Then save and close the file.
The Server and VAUs can now communicate with both the storage units on the private network and client computers on the primary network.
CONFIGURING THE VSANWatchService
VSANWatchService runs on a VSAN Server to monitor the operation of a VSAN storage unit. If a drive fails in an VSAN unit’s array,
VSANWatchService sends an error message to the DS server. This error message is then displayed when you run the Digital Sentry client
application. A degraded array also triggers the FlashGuard relay output (refer to FlashGuard and the WatchDog Service on page 40 for more
information).
When you install the VSAN Server software from the Server/VAU CD, VSANWatchService is automatically installed and configured. After
installation, you must also configure the DS server to recognize errors received from the VSAN Server. To do this, complete the following steps on
the DS server:
1. Run DSWatchEventEditor from the Start menu.
2. Enter the IP address of the VSAN unit under RAID IP Address and click Add. Repeat for each VSAN unit.
3. Click Update and then exit DSWatchEventEditor.
4. Start or restart the Digital Sentry WatchDog and DSVSANWatch services.