Chapter 5 Configuration Overview 5-19
3. Map the logical drive each server is using to the controller channels that the
server is connected to.
DAS configurations are typically implemented using a fabric loop (FL_port) mode. A
loop configuration example is described under “A DAS Loop Configuration
Example” on page 5-16.
Fabric loop (FL_port) connections between a Sun StorEdge 3510 or 3511 FC array
and multiple servers allow up to 1024 LUNs to be presented to servers. For
guidelines on how to create 1024 LUNs, see “Planning for 1024 LUNs (Optional,
Loop Mode Only)” on page 6-37.
Perform the following steps, which are described in more detail later in this manual,
to set up a DAS loop configuration based on
FIGURE 5-3 and FIGURE 5-4.
1. Check the location of installed SFPs. Move them as necessary to support the
connections needed.
You need to add SFP connectors to support more than four connections between
servers and a Sun StorEdge 3510 or 3511 FC array. For example, add two SFP
connectors to support six connections and add four SFP connectors to support eight
connections.
2. Connect expansion units, if needed.
3. Create at least one logical drive per server, and configure spare drives as needed.
4. Create one or more logical drive partitions for each server.
5. Confirm that the Fibre Connection Option is set to “Loop only.”
Do not use the “Loop preferred, otherwise, point to point” option, which should not
be used for this product.
Caution – Do not use the command, “Loop preferred, otherwise point to point.”
This command is reserved for special use and should be used only if directed by
technical support.
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