User`s guide

Front Panel LED Indicators
Each disk drive and the host connection have two LEDs to indicate drive status and/or host
communication status. LED 0 is on the left and is typically blue; LED 1 is on the right and is typically
green. In addition, there is one error-condition LEDs, labeled‘!’and the SiI 4726 power on
indicator‘OK’.
57
When the SiI 4726 Storage Appliance is powered on, the host scans the disks in sequence, as
indicated by a brief flash of lights on LED 1. Once the host scan is complete, LED 1 is lit for each drive
present. During disk operations, LED 0 flashes as data is transferred to and from the drive and the
host.
If a SAFE volume is being rebuilt, LED 1 blinks slowly on both mirrored disks.
Table 15 Status Indicators for 0 and 1 LEDs
LED 0 LED 1 Description
Off
Off
Power on, no device attached
Off On PHY communication established (Activity = LED0 On)
On Blink Rebuild
Blink Blink Error
Table 16 Status Indicators for ! and OK LEDs
! OK Description
Off
On
Startup or ON indication. OK LED will flash during reset and
will remain green in all other cases.
On
ERROR. The‘!’LED will light as a result of an EEPROM error during
boot or following a runtime error.