Connecting The Led Activity Indicator - Adaptec AAA-133U2 - AAA 133 RAID Controller Hardware Manual

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Connecting the LED Activity Indicator

(Optional) An LED on the front panel of most computers lights to
indicate non-SCSI hard disk activity. If you want the LED to light
whenever there is activity on the AAA-131U2/133U2 instead, you
must disconnect the LED cable from the motherboard and connect it
to the LED connector on the AAA-131U2/133U2. If the LED has a
2-pin cable, connect the cable to pins 1 and 2 of the LED connector.
(Figure 2-5 shows the connection on an AAA-133U2 card.)
Note: If you are using non-SCSI disk drives (e.g., IDE), the
LED will no longer indicate activity on these drives when
you connect the LED cable to the AAA-131U2/133U2.
2-pin
LED
Cable
Figure 2-5. Connecting the LED Activity Indicator
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2-5