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Check the output from the show device command against the physical
SBBs. There should be a one-to-one correspondence between SBBs report-
ing to the console and the physical devices mounted. Note that the node
number reported by the console corresponds to the physical position of an
SBB within a shelf; the slots and nodes are numbered 0 to 6, from right to
left (see Figure 7-4).
Figure 7-4 shows two storage shelves: one with a DWZZA and one without.
A DWZZA is a bidirectional bus converter that converts differential signals
to single-ended signals and converts single-ended signals to differential
signals. Figure 7-4 is not exhaustive; other devices fit into StorageWorks
shelves and look very different from the configuration shown.
The KFTIA has three differential ports (ips0, ips1, and ips2); RZ26, RZ26L,
and RZ28 disks are single-ended devices used in StorageWorks shelves;
DWZZAs are used to perform bus conversion if necessary. Although the
DWZZA-VA takes up a slot, it is not a node on the bus and is not "seen" by
the system.
Each SBB has two LEDs. The green LED on the top lights when the SBB
is mounted and is being accessed. For a complete discussion of
StorageWorks LED status, see the StorageWorks Solutions Configuration
Guide (EK-BA350-CG).
If you have problems seeing devices, reseat the SBBs and reissue show
device. If you need further testing, use the test command. Refer to
BA350 documentation if you need to reconfigure the buses.
For more information:
Service Manual
BA350 Modular Storage Shelf Subsystem Configura-
tion Guide or User's Guide
Diagnostics and Utilities 7-15
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