Intel® Server Chassis SR1475 / Intel® Server System SR1475NH1-E
Revision 1.0
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3.4.2.3
External Memory Device
The SATA backplane contains non-volatile 32K and 64K serial EEPROM devices for boot and
run-time/configuration code storage respectively. These devices reside on the GEM424’s
private I2C bus.
The SEEPROMs operate off the 5.0V rail and are housed in 8-pin SOIC packages.
3.4.2.4 LED
Support
The SATA backplane contains a green activity LED and an amber fault LED for each of the
three hard drive connectors. The activity LED is driven by the GEM424 or, for drives that
support the feature, by the SATA HDD whenever the drive is accessed. The fault LED is driven
by the GEM424 controller whenever an error condition is detected, as defined by the firmware.
Activity and fault LED functions are only available when a SATA host controller that supports the
SAF-TE protocol over I2C is connected to the SATA backplane via the SATA Host I2C
connector, J2A3.
Table 12. LED Function
Status LED
Definition
Green ON
HDD Activity
Amber ON
HDD Fail
Amber Blinking
Rebuild in progress
3.4.3
SATA Backplane Connector Definitions
3.4.3.1 Power
Connector
The SATA backplane provides power for up to three SATA drives, and one floppy drive or CD-
ROM drive. A 6-pin power cable from the power supply harness is routed to the backplane and
plugs into a 2x3 shrouded plastic PC power connector. The following table provides the
connector pin-out.
Table 13. SATA Backplane Power Connector Pin-out
Pin
Name
Pin
Name
1 GND
4 P12V
2 GND
5 P12V
3 P5V
6 P5V_STBY
Summary of Contents for SR1475
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