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User Guide
Figure 12: HDD Assembly LED Location
Table 15: HDD Assembly LED Identification
Number
LED Name
1
HDD Drive Multi-
Function LED
Note: During service events—when a drive is hot plugged or replaced and the drive installed
properly—the LED state of that drive slot will change to solid ON. This is to provide the user
with visual feedback that the drive has been successfully connected and has been discovered
by the expander. Once the enclosure has been slid back into the rack and the OPEN bit on the
door sensor element is 0, the LED will return to the previously set state (Ident, Fault, or Off).
For example: A drive in slot 0 needs to be replaced. The fault bit on Array Slot descriptor
0 is set to indicate to the service technician which drive slot to replace. This will cause the
LED to blink at 1Hz (50% duty cycle). When the service technician pulls out the enclosure,
inserts a new drive, and successfully installs the drive, the slot LED state will change to solid
ON to indicate that the drive was properly installed. When the service technician pushes the
enclosure back into the rack and the OPEN bit of the door sensor element changes from 1
to 0, the LED state of drive slot 0 will change back to the fault indication blink rate (1 Hz 50%
duty cycle).
1.12 Ultrastar Data102 Rack Requirements
The Ultrastar Data102 is designed to be installed into a rack that meets the EIA-310 standard at a minimum
1181-1197 mm (46.5in. - 47.13in.) of usable rack space, frame to frame . The vertical rack rails must be set
between 812.8 - 914.4 mm / 32 - 36 in. to support the enclosure. It requires 4U of rack space, and it should
be installed into the rack at the lowest possible U height to keep the load on the rack balanced.
Color
Amber Blink @ 2 Hz (50% duty cycle) – Drive identify
Blink @ 1 Hz (50% duty cycle) – Drive fault
Off – Drive has no faults
1.12 Ultrastar Data102 Rack Requirements
Behavior
1. Overview
16
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