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Install - Step 7 continued
Power up and cable optional DAEs
Setting the DAE enclosure addresses
You must set the enclosure address (EA) when power is on and the enclosure is not part of a
back-end bus; you cannot change the EA while the back end is connected.
You add DAEs to a CX4 series storage system along Fibre Channel back-end buses
that start at I/O modules in the SPE. Each disk enclosure in a bus must have a unique
enclosure address (also called an EA, or enclosure ID) that identifies the enclosure
and determines disk module IDs.
Every DAE that is not preinstalled in a cabinet before shipment has a default
enclosure address of 0. DAEs directly connected
to the SPE
retain EA 0; subsequent
DAEs connected together in a back-end bus should have incremental EAs of 1, 2, 3
and so on.
The CX4-960 can support 120 disks, or a maximum of 8 disk-array enclosures, on each
back-end bus for a total of 960 disks.
Addressing rules
For the system to boot and operate, the first DAE — connected to port 0, slot 0 on both
SPs — must have enclosure address (EA) 0. A DAE with boot disks and the CX4-960
operating system is always assigned enclosure address 0 prior to shipment.
Optimize your system by using all available back-end buses, and spreading the DAEs
as evenly as possible across them.
Setting the addresses
Follow these steps to set enclosure addresses on your DAEs:
1. Verify that the first DAE, connected to the SPS and containing the storage-system
software disks, is set as enclosure address 0. The address is indicated by the LED
next to the enclosure # symbol, as shown below.
