UltraSCSI RAID Enclosure 4–1
4
Power Verification and
Addressing (PVA)
The PVA (power verification and addressing) assembly (Figure 4–1) and the
associated EMU monitors the status of the major UltraSCSI enclosure
components to verify proper operation. When an error or fault condition
occurs, these modules notify the user, and, in some instances, the array
controller, that a problem exists. The array controller can identify and
display information about some problems. The PVA and EMU LED
displays identify possible problem causes.
Figure 4–1 PVA
CXO-5737A
___________________ Caution _____________________
Proper operation of an UltraSCSI subsystem requires an
operational EMU (model DS–BA35X–EB) and PVA (model
DS–BA35X–EC) in each enclosure. You must also establish
communications links between the EMUs to ensure proper
subsystem operation and error reporting.
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Summary of Contents for StorageWorks UltraSCSI DS-BA370 Series
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