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Chapter 1 Overview
First read this chapter if you use the N8103-94 Additional DAC Battery (called BBU below)
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 N8103-90/91 Disk Array
Controller (SAS).
Connecting the BBU to the disk array controller can prevent data from being lost due to an
unforeseen accident including instantaneous power interruption (in the WriteBack mode).
Backup of data in cache memory on disk array controller for up to 72 hours
Improvement of reliability in WriteBack mode
Use of rechargeable NiMH battery
2. Specification
Item
Maximum data backup time
Outer dimension (mm)
Weight
Battery capacity
Operating
Temperature
environment
Humidity
Storage
Temperature
environment
Humidity
Life (battery back)
Specification
72 hours
39 (width) × 133 (depth) × 9 (height)
About 0.10 kg
4.22 Wh
10 C - 35 C
20% - 80%
0 C - 35 C
20% - 80%
About 2 years
Remarks
Full charging
Normal operation
Without condensation
Without condensation
Varies depending on
operating environment and
boundary conditions
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