3. Replace the protective caps on the cable ends.
Cabling the EXP3500 expansion enclosure
The EXP3500 expansion enclosure comes with one ESM, which enables you to
connect the EXP3500 expansion enclosure to a DS3500 storage subsystem. If you
are attaching the EXP3500 to a dual controller DS3500 storage subsystem, you
must add a second ESM to the EXP3500 expansion enclosure to provide a
redundant drive path.
ESM connectors
Figure 34 shows the connectors on the ESM.
SAS In 1
Connect a SAS cable to this connector and to either an IBM SAS RAID
controller or the SAS Out (↓) connector of another EXP3500.
SAS In 2
Connect a SAS cable to this connector and to either an IBM SAS RAID
controller or the SAS Out (↓) connector of another EXP3500.
SAS Out
Connect a SAS cable to this connector and to the SAS In (↑) connector of
another EXP3500.
Note: Each ESM contains two SAS In connectors. You can use either SAS In
connector but only one SAS In connector can be used at a time.
Single-ESM configuration
The DS3500 RAID controller supports more than one EXP3500 expansion
enclosure per drive expansion port. You can connect two or more EXP3500
Figure 33. Removing the LC-LC Fibre Channel cable from an LC-SC Fibre Channel cable
adapter
1 2
ESM
SAS in connector 1 SAS in connector 2 SAS out connector
Figure 34. ESM connectors
Chapter 3. Cabling the storage subsystem and expansion enclosure 37
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