Fans - Hitachi NAS Platform 4000 Series Hardware Reference Manual

Figure 11 Hard disk drives status and activity status LEDs - models 4060, 4080,
and 4100
Item
1
2
LEDs
Blue
Red

Fans

The server features dual hot-swappable fan assemblies. The fans provide for front-to-
back airflow to be consistent with other storage system components.
The server's cooling airflow enables the system to operate in an ambient temperature
range of 10°C to 35°C when mounted in a rack or cabinet with associated components
required to make up a storage system. The storage system administrator is responsible
for ensuring that the ambient temperature within the rack does not exceed the 35°C
operating limit.
The server continues to operate following the failure of a single fan and during the
temporary removal of a fan for replacement. Replace a failed fan as soon as possible.
Hitachi NAS Platform and Hitachi Unified Storage Series 4000 Hardware Reference
Disk A status and activity LEDs
Disk B status and activity LEDs
Table 8 Hard disk activity and status LEDs
If this LED is on and blue, the disk is operating normally and no
problems have been detected. If the LED is flashing blue, it indicates
disk activity. If the LED is on, but not flashing, there is currently no
disk activity.
If this LED is on immediately after installing a new hard disk, it
indicates that the RAID configuration for the server is being rebuilt.
The LED will turn off after the RAID configuration is restored. The
amount of time it takes for the RAID configuration to be rebuilt after a
new disk drive is installed depends on the amount of user and system
configuration data stored.
If this LED is on during the course of normal operation (not after
installing a new hard disk), either the disk has failed or the server's
RAID configuration has been degraded.
Chapter 4: Hitachi NAS Platform server components
Description
Meaning
Fans
41