Digital Equipment Corporation Storage Works Uživatelská příručka stáhnout pdf (Strana 37)

Power

This chapter describes the StorageWorks power units and power conﬁguration

rules. All of the StorageWorks power units are mounted in a 3½-inch SBB.

The are three StorageWorks power units:

• Universal ac input power supply

• Universal dc input power supply

• BBU

4.1 Shelf Power Conﬁguration Rules

The rules for conﬁguring the StorageWorks shelves are as follows:

• Each shelf requires either an ac or dc shelf power supply.

• Each power supply requires a switch-controlled power source.

• Each power supply can support a maximum of seven 3½-inch SBBs.

• The shelf power supply must be mounted in slot 7 (the power slot) of the

shelf.

• Either an optional redundant power supply or an optional BBU

can be

mounted in slot 6.

• Both ac and dc power supplies can be used in the same shelf as either the

shelf power supply or the redundant power supply.

BBUs cannot be used in a BA350–MA controller shelf.

Power 4–1

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Digital Equipment Corporation Storage Works Uživatelská příručka Strana 37