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(1)
Power supplies (PS1/PS0)
The power supplies are provided to supply power to the disk array unit. See Section 3.3 "Power
Supply" for details.
(2)
Controllers (CONT1/CONT0)
The controller boards are provided to control the disk array unit. See Section 3.4 "Controller" for
details.
(3)
Battery Backup Unit (BBU1/BBU0)
The battery backup units are provided to protect data in the cache memory when a power failure
occurs.
In the standard configuration of the S2500, two battery backup units are installed in each power supply.
In the standard configuration of S1500, one battery backup unit is installed in each power supply. The
battery backup units are also provided as optional batteries (NF1500-SZ01E) for the expansion
configuration.
See "3.5 Battery Backup Unit" for details.
(4)
Fans (FAN1-[0]/FAN1-[1]/FAN0-[0]/FAN0-[1])
The fans are provided to prevent the heat-up of the overall system.
When the power switch is set to ON, four cooling fans are rotating. Note that the ventilation holes are
not to be blocked.
•
Install the disk array unit so that the ventilation holes are not blocked. If either or both
of the ventilation holes are blocked, the internal temperature of the disk array unit
may increase, causing a fault to occur.
•
The disk array unit is equipped with four fans. Even if a fan fails, the air-cooling
conditions for the entire disk array unit are satisfied. However, to guarantee the safe
and proper operation of the disk array unit, replace the power supply immediately if a
fan failure occurs.
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