Sun Microsystems StorEdge, Troubleshooting Manual

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Chapter 2 Configurations 23
Zones and Storage
You can dynamically add storage to a port-based or WWN-based zone, using
cfgadm
procedures for the Sun StorEdge T3 arrays. This requires the Sun StorEdge
T3 and T3+ arrays to be connected as TL or Fabric devices.
Cascading Rules
■
Hub-to-switch connectivity is not supported
■
If 1- and 2-gigabit switches are used together, a maximum of 16 switches can be
cascaded.
■
If only 2-gigabit switches are used, a maximum of 64 switches can be cascaded.
■
The maximum distance is 10 kilometers.
■
Any number of ISL hops can be used between two switches.
■
ISL hops do not include the connections between hosts and switches or between
switches and storage.
Rules for Adding and Removing Devices While
the Hosts are Online
You can add all initial and additional storage devices while the host is online.
In high availability configurations, where alternative methods to reconstruct the data
exist, you can remove a device or path. Host volume management or multi-pathing
software handles this device removal. For non-available configurations, you must
ensure that no host application is configured to use the device.
In the case of a fabric configuration (name server zone), you must unconfigure the
device on the host. This ensures that during the boot process the host does not
attempt to probe this device to create device nodes.
You can add or remove a host without shutting down the SAN.
TABLE 2-11
Arrays, Zones, and Initiators
Array Maximum Arrays/Zone Maximum Initiators/Zone
Sun StorEdge T3
array 252 (252 Sun StorEdge T3 arrays in a work
group, or 126 Sun StorEdge T3 arrays in an
enterprise configuration) 252