Chapter 4. IBM System Storage DS3500 and EXP3500 Cabling 101
Draft Document for Review March 28, 2011 12:24 pm 7914Cabling2-1908.fm
component in the drive channel fails, the DS3500 controllers can still access the EXP3500
expansion enclosures in the redundant drive-channel pair.
4.6.2 Drive channel cabling rules
You should always follow these two basic connection rules when attaching EXP3500
enclosures to a DS3500 storage subsystem:
ň° Connect the drive expansion SAS port on the DS3500 controller to the SAS IN port on the
EXP3500.
ň° Connect the SAS OUT port on the EXP3500 to the SAS IN port on the next EXP3500.
Attention: The EXP3500 ships with one ESM installed. If you are going to attach the
EXP3500 to a dual controller DS3500 storage subsystem then you must install a second
ESM in the EXP3500 expansion enclosure to provide redundant drive paths to the
EXP3500 enclosures. Connecting an EXP3500 with one ESM installed to a DS3500 with
two controllers installed is not a supported configuration.
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