IBM EXP15, Hardware Maintenance Manual

Page: 89 / 146

Installing identification labels:
Your expansion unit
comes with two expansion unit ID labels.
Serial number label Expansion unit ID labels
1. Install the expansion unit ID labels.
a. Verify the setting of the tray number switches
(0–9).
b. Apply the expansion unit ID labels that match the
setting for the tray number switches.
2. Continue with “Cabling the expansion unit.”
Cabling the expansion unit:
This section provides
the FC expansion unit power cabling information. After
you attach your expansion unit power cables, use the
instruction provided in “Turning the expansion unit on and
off” on page 65 for the initial startup of the expansion unit.
The Netfinity FAStT EXP500 provides redundant loop
support. A redundant Netfinity FAStT EXP500 loop
consists of one or more expansion units connected to a
host (controller) using two sets of FC cables. If one FC
fails, the host will use the other Netfinity FAStT EXP500
loop to maintain I/O to the Netfinity FAStT EXP500 array
group.
Fibre Channel loop:
A Fibre Channel (FC) loop
consists of FC disk drives connected to each other and to
one or more controllers. A loop can support multiple
controllers, a large number of disk drives, and other
addressable entities such as system management logic
chips. Refer to your controller documentation for
information on controller-dependent hardware configuration
details. Some controllers might have restrictions on the
maximum number of disk drives supported on a loop,
cabling restrictions, and other requirements.
GBICs:
Your Netfinity FAStT EXP500 expansion unit
supports large, complex and redundant, disk drive loop
configurations. Each ESM board has two GBIC ports.
These GBIC ports are labeled with an (input) and a
(output). You build a loop by connecting one or more
Netfinity FAStT EXP500 expansion units to one or more
controllers. You then use dual fibre optical cables to
connect one Netfinity FAStT EXP500 expansion unit to
another in a daisy-chain. It takes only one GBIC on the
ESM board to connect a single Netfinity FAStT EXP500
expansion unit to a controller.
Netfinity FAStT EXP500 - Type 3560
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