HP Array Controller HSG V8.7 Software - Manual (Page 27)

Introducing the UltraSCSI RAID Enclosure
UltraSCSI RAID Enclosure 1–5
Product Description
The UltraSCSI enclosure is a rack-mountable storage subsystem that
accommodates the following components:
• Depending upon the configuration, a minimum of zero, or a
maximum of two, UltraSCSI controllers with cache modules
1
,
such as the DS–HSZ70 series.
• An environmental monitoring unit (DS–BA35X–EB), the
EMU, that monitors enclosure operation, detects and reports
error conditions, and can automatically initiate corrective actions.
• A power verification and addressing assembly
(DS–BA35X–EC), the PVA, that establishes enclosure and
storage device addressing, monitors enclosure operation, and
detects and reports error conditions.
• A minimum of one, or a maximum of two, ac input boxes
(DS–BA35X–HE), also called ac power controllers, that
distribute ac power to the shelf power supplies.
• Either five or eight shelf power supplies (DS–BA35X–HH) that
provide dc power for enclosure operations.
• Eight dual-speed blowers (DS–BA35X–ML) that cool the
components by drawing air in through the front and exhausting it
out the rear.
• Six single-ended input/output (I/O) modules
(DS–BA35X–MN) for connecting enclosures together.
• A maximum of 24 single-ended, 3.5-inch SBB disk drives for
data storage.
For enclosures with fewer than 24 disk drive SBBs or 8 power
supplies, installing the optional blank bezels (DS–BA35X–PB, this
model number provides six blank bezels) will improve air flow.
1. Each cache module requires an external cache battery (ECB),
DS–HS35X–Bx series. The batteries should be installed either in an
ECB shelf or a departmental server cabinet top cover.