Datoptic ARC-1680 Series Manual do Utilizador descarregar pdf (Página 28)

HARDWARE INSTALLATION

Step 7. Install the LED Cable (option)

The preferred I/O connector for server backplanes is the Min SAS 4i

internal connector. This connector has eight signal pins to support

four SAS/SATA drives and six pins for the SGPIO (Serial General

Purpose Input/Output) side-band signals. The SGPIO bus is used

for efcient LED management and for sensing drive Locate status.

See SFF 8485 for the specication of the SGPIO bus. For backplane

without SGPIO supporting, Please refer to Section 2.4 LED cables

for fault/activity LED cable installation.

LED Management: The backplane may contain LEDs to indicate

drive status. Light from the LEDs could be transmitted to the out-

side of the server by using light pipes mounted on the SAS drive

tray. A small microcontroller on the backplane, connected via the

SGPIO bus to a SAS RAID controller, could control the LEDs. Activ-

ity: blinking 5 times/second and Fault: solid illuminated

Drive Locate Circuitry: The location of a drive may be detected by

sensing the voltage level of one of the pre-charge pins before and

after a drive is installed.

The following signals dene the SGPIO assignments for the Min

SAS 4i internal connector (SFF-8087) in the SAS RAID controller.

The pin assignment of the sideband inputs follow SFF-8448 speci-

cation.

PIN Description PIN Description

SideBand0 SClock (Clock signal) SideBand1 SLoad (Last clock of a bit

stream)

SideBand2 Ground SideBand3 Ground

SideBand4 SDataOut (Serial data

output bit stream)

SideBand5 SDataIn (Serial data input bit

stream)

SideBand6 Reserved SideBand7 Reserved

Step 8. Adding a Battery Backup Module (optional)

Please refer to Appendix B for installing the BBM in your SAS RAID

controller.

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Datoptic ARC-1680 Series Manual do Utilizador Página 28