Compaq StorageWorks UltraSCSI RAID Enclosure (DS-BA370 Series) User's Guide (EK-BA370-UG. C02, September 1998)

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.