User`s guide

3
Configuration Rules and Restrictions
This chapter describes configuration rules and restrictions for the SW300-series
redundant array of independent disks (RAID) enclosure. When specific rules and
restrictions are not provided, references are given to the proper StorageWorks
documentation.
3.1 System Configurations
Table 3–1 lists the operating configurations for the SW300 enclosure.
Table 3–1 Configurations
Field Replaceable Unit Minimum Maximum
StorageWorks Building Block (SBB) Shelf Power
Supplies (BA35X–HD)
4 8
3½-Inch Storage SBBs (SWXBA–BA (fixed media) or
SWXBA–BB (removable device))
1 24
5¼-Inch Storage SBBs (SWXBB–BA) 0 8
HS-series Controllers with Cache Memory
1
1 2
Environmental Monitor Units (EMUs) (BA35X–EA) 1 2
AC Power Entry Controllers (BA35X–HE) 1 2
Dual Speed Blowers (BA35X–MD) 8 8
1
Includes HSD30, HSJ30, HSJ40, HSZ10, HSZ15, and HSZ40 controllers.
3.2 Input Power Cord Routing and System Redundancy
The SW300 can be configured with dual ac power redundancy. The optional dual
power redundancy configuration consists of both ac power cords from the ac power
entry controllers being plugged into a primary ac power source (wall outlet) and
an auxiliary ac power source (the same or another wall outlet).
For complete power redundancy, an option is to provide independent, external
power sources. Thus, one ac power entry controller receives ac input power from
one circuit while the second ac power entry controller receives it from a different
circuit.
Configuration Rules and Restrictions 3–1