NEC S2500 User Manual page 32

(1) POWER LED (green)
The POWER LED lights green if the AC power is supplied and the power switch is set to ON. The
LED is off if the power switch is set to OFF.
(2) SERVICE LED (orange)
The SERVICE LED lights orange when the disk array unit or a disk array unit component including an
additional FC disk enclosure (if installed) fails. The LED flashes during the self-test and initialization
sequence immediately after the power is turned on.
The LED goes off when the disk array unit has started, and it is off while the disk array unit is
operating normally.
(3) SHUTDOWN switch
Use this switch to turn off the disk array unit. Turning on this switch starts writing the cache data
remaining in the array controller into disk drive.
To power off the disk array unit, see "7.2 Power On/Off of Disk Array Unit" for details.
Data backed up will be lost if a controller, power supply, or battery is replaced in the
following conditions:
•
The scheduled stop procedure using the SHUTDOWN switch is not performed.
•
There are not any power supplies that are supplying power to the array controller
normally.
(4) Disk drive / dummy tray
Disk drive: A hard disk drive (HDD) with a dedicated tray is installed.
Dummy tray: Only a dedicated tray with no HDD is installed
(5) Hard disk drive READY LED (green)
The READY LED lights green while the disk drive is operating normally, and flashes while the disk
drive is transferring data.
This LED also flashes during the self-test and initialization sequence immediately after the power is
turned on.
(6) Hard disk drive FAULT LED (orange)
The FAULT LED lights when the disk drive fails.
The LED is off while the disk drive is operating normally.
(7) Ejector
Use the ejector to install/remove disk drives or dummy trays.
In general, secure the disk drive and dummy tray to the frame.
When inserting the disk drive into the disk enclosure, push it as far as it will go and then
lock the ejector.
Incorrect insertion may cause a malfunction.
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