1. Connect the DCS3700 expansion enclosure to controller A:
a. Connect one end of a SAS cable to the drive expansion port on controller A.
b. Connect the other end of the SAS cable to one of the In (↑) SAS connectors on the ESM located in
SBB slot A in the DCS3700 expansion enclosure.
2. Connect the DCS3700 expansion enclosure to controller B:
a. Connect one end of a SAS cable to the drive expansion port on controller B.
b. Connect the other end of the SAS cable to one of the In (↑) SAS connectors on the ESM located in
SBB slot B in the DCS3700 expansion enclosure.
Figure 34 on page 53 shows a DCS3700 storage system configured with a single DCS3700
expansion unit.
To connect the DCS3700 storage system RAID controllers A and B to multiple DCS3700 expansion
enclosures, complete the following steps:
1. Connect the DCS3700 expansion enclosure to controller A:
a. Connect one end of a SAS cable to the drive expansion port on controller A.
b. Connect the other end of the SAS cable to one of the In (↑) SAS connectors on the ESM located in
SBB slot A in the first DCS3700 expansion enclosure.
2. Connect the of the DCS3700 expansion enclosure to the next DCS3700 expansion enclosure in the
chain:
a. Connect one end of a SAS cable to the Out (↓) SAS connector on the ESM located in SBB slot A of
the DCS3700 expansion enclosure that you just connected.
b. Connect the other end of the SAS cable to one of the In (↑) SAS connectors on the ESM located in
SBB slot A in the next DCS3700 expansion enclosure in the chain.
3. Connect the last DCS3700 expansion enclosure in the chain to controller B:
a. Connect one end of a SAS cable to the drive expansion port on controller B.
b. Connect the other end of the SAS cable to one of the In (↑) SAS connectors on the ESM located in
SBB slot B in the last DCS3700 expansion enclosures of the chain that you created.
4. Connect the second DCS3700 expansion enclosure to the first DCS3700 expansion enclosure.
a. Connect one end of a SAS cable to the Out (↓) SAS connector on the ESM located in SBB slot B of
the second DCS3700 expansion enclosure.
b. Connect the other end of the SAS cable to one of the In (↑) SAS connectors on the ESM located in
SBB slot A of the first DCS3700 expansion enclosure.
Figure 35 on page 54 shows a DCS3700 storage system configured with two DCS3700 expansion
units.
52 IBM System Storage DCS3700: Installation, User, and Maintenance Guide
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