Digital Equipment StorageWorks UltraSCSI DS-BA370 Series, User Manual

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Introducing the UltraSCSI RAID Enclosure
Ultra SCSI RAID Enclosure 1–5
Product Description
The UltraSCSI enclosure is a rack mountable unit that accommodates the
following components:
•
A minimum of one, 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 power controllers (DS–
BA35X–HE), the power controllers, to distribute ac power to the
shelf power supplies
•
A minimum of five, and a maximum of eight shelf power supplies (DS–
BA35X–HH)
•
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 I/O modules (DS–BA35X–MN) for connecting
enclosures together
•
A maximum of 24 single-ended, 3.5-inch SBB disk drives
•
Expansion enclosures have filler panels installed in the controller and
cache module slots that improve air flow and reduce EMI radiation
•
For enclosures with fewer than 24 disk devices, installing the optional
blank bezels (DS–BA35X–PB) improve air flow and reduce EMI
radiation.
•
The blank panels in the controller B and cache module B locations
improve air flow and control EMI in enclosures with only one
controller.
1
Each cache module requires an external cache battery (DS–BA35X–Bx series).
The batteries are installed either in a data center cabinet shelf or a
departmental server cabinet top cover—not in the enclosure.