Sun Microsystems FC Switch-8 and Switch-16 816-0830-12 - Manual (Page 44)

14 Sun StorEdge Network FC Switch-8 and Switch-16 Installation and Configuration Guide • October 2001
■ Maximum cascading distance is ten kilometers
■ In cascaded configurations, hosts cannot be connected to both switches in a single
zone with storage connected, and storage cannot be connected to both switches in
a single zone. In other words, a switch zone can have remote storage only or local
storage only, but cannot mix the two.
■ Switch-to-switch connection is supported for distance only
■ Only LW GBICS are supported between switches
■ Cascading is supported for nameserver zones only. These are used for Sun
StorEdge T3 array and FCIP connectivity.
■ A maximum of two switches can be connected for distance
■ Both 8-port to 16-port and 16-port to 8-port switch connectivity is supported
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, except
the Sun StorEdge A3500 FC array, which requires rebooting the host on the first LUN
addition.
In high availability configurations, where alternative methods to reconstruct the data
exist, a device or path to the device can be removed. Host volume management or
multi-pathing software handles this device removal. For non-available
configurations, the user must ensure that no host application is configured to use the
device.
In the case of a Fabric configuration (nameserver zone) the user 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.
For details on adding a storage device, refer to “Adding Storage Devices” on
page 123. For details on removing a storage device, refer to “Removing Storage
Devices” on page 124.
You can add or remove a host without shutting down the SAN.