Setting the interface options
The FAStT EXP700 comes with two enclosure ID switches that are used to identify
the FAStT EXP700 on a Fibre Channel loop, and to assign physical addresses to
the drives. The enclosure ID switches are located on the back of the expansion
unit, as shown in Figure 15.
Fibre Channel loop and ID settings
When you install a hard disk drive in the expansion unit, the drive tray plugs into a
printed circuit board called the
midplane
. The midplane sets the Fibre Channel loop
ID automatically, based on the enclosure ID switch setting and the physical location
(bay) of the hard disk drive.
Enclosure ID settings
Enclosure ID switch settings (values 0 through 7) set various addresses and IDs.
Enclosure ID switch X1 is for setting the ones position, and Enclosure ID switch
X10 is for setting the tens position. The settings of the two enclosure ID switches,
when used together, provide a two-digit ID of the expansion unit. The
storage-management software uses the enclosure ID to provide a correlation
between the storage-management graphics and the physical expansion unit. The ID
indicates which physical unit corresponds to the storage-management software
status.
Use Enclosure ID switches X10 and X1 to set the expansion-unit ID to any value
from 0 through 7. Each expansion unit that is connected to a Fibre Channel
controller should have a unique ID. The ID must be different from all other
expansion units connected to the storage server. Refer to your storage server
documentation for more information.
Enclosure ID switch X1 also sets the physical IDs of the drives within the expansion
unit. Use the X10 switch setting to identify the loop where the FAStT EXP700 is
located.
1 Gb/s
2 Gb/s
X10
X1
Tray Number
Conflict
Green LED
Amber LED
1 Gb/s
2 Gb/s
X10
X1
Tray Number
Conflict
Figure 15. Setting the interface options
Chapter 2. Installing the FAStT EXP700
19
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