Raid Array 3000 6-Slot Device Expansion Shelf - Compaq StorageWorks RAID Array 3000 Controller Shelf Hardware User's Manual

Figure 1–2 RAID Array 3000 6-Slot Device Expansion Shelf (Optional)
A battery-backup subsystem is included with the Controller Shelf in the form of
a rackmount UPS (Uninterruptable Power Supply). In case of a power failure, the
UPS provides temporary power to the storage system while it flushes its cache
contents to disks. The UPS is normally installed in the lowest available slot in
the cabinet.
The UPS is sized to perform this function for the
Controller and Device Expansion Shelves only. No
other electrical devices should be plugged into the
UPS.
As an option, a second RAID controller module can be added for redundancy.
The second controller operates in conjunction with the installed controller to
protect data in case of a malfunction in the primary unit. The optional controller
is installed directly below the primary controller in the center of the shelf.
The RAID Array 3000 Controller Shelf enclosure and its associated options are
listed and described in Table 1–1.
EK–SMCPQ–UG. C01
Chapter 1. Product Overview
CAUTION
SHR-1091
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