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Chapter 1 - Overview
First read this chapter if you use the Additional DAC Battery (called BBU hereafter) for the first time.
This chapter describes the characteristics and configuration of the BBU and outlines the additional battery
installation job.
1. Characteristics of BBU
The BBU is an additional battery exclusively used for the Promise SuperTrack EX8350 Disk Array Controller
(SATA2) (called disk array controller hereafter).
Connecting the BBU to the disk array controller can prevent data from being lost due to an accident including
instantaneous power interruption (in the WriteBack mode).
Backup of data in SDRAMs on disk array controller for up to 72 hours
Improvement of reliability in WriteBack mode
Use of rechargeable lithium ion battery
Can be installed in either of PCI/PCI-X slot or PCI-Express slot by changing the installation position
of PCI bracket.
2. Specification
Item
Maximum data backup time
Outer
Use of full-height PCI
dimension
bracket
Use of low-profile PCI
bracket
Weight
Operating voltage
Power consumption
Operating
Temperature
environment
Humidity
Storage
Temperature
environment
Humidity
Life (battery back)
Specification
72 hours
121 (width) × 120 (depth) x 22
(height) mm
81 (width) × 120 (depth) x 22
(height) mm
Approx. 0.10 kg
3.7 V or higher
1.92 W
10°C to 35°C
20% to 80%
0°C to 35°C
20% to 80%
About 2 years
Remarks
Full charging
Excluding battery cable
In normal operation
Without condensation
Without condensation
Varies depending on operating
environment and boundary conditions
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