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EMC Disk-Array Processor Enclosure (DPE) Deskside Model FC4400/4500 Hardware Reference
About the Deskside Disk-Array Processor Enclosure
When the DPE is configured to operate in a fabric environment, only one of
the SP ports (A or B) can be used to connect to the external Fibre Channel
environment.
The SP has two Fibre Channel ports (A and B) referred to as the SP
front end, for connecting to the external Fibre Channel environment.
It also has two rotary switches for setting the FC-AL address ID when
operating in a Fibre Channel Arbitrated Loop environment.
The SP connects to disk modules and to its corresponding LCC via an
internal FC-AL. SP A connects to LCC A, and SP B to LCC B. The
SP-LCC interface is called the SP back end.
The SP also has a console connector (with a terminal icon), a
connector for the standby power supply, marked SPS, and a LAN
connection. Each SP has two status lights visible from the back of the
DPE. For the meaning of these lights, see the “Monitoring DPE
Status” section in Chapter 3.
If a DPE has one SP, you can install a second one while the DPE is
running. When both SPs are installed, you can replace either SP while
the DPE is running. You should never attempt to replace any of the
SP’s components, except the memory modules and GBICs.
Figure 1-9
Installing an SP
