SUPER MICRO Computer AS1020S-8 user manual Scsi Activity LEDs, Post Code LEDs

AS1020S-8 User's Manual

SCSI Activity LEDs

There are two SCSI activity LEDs on the serverboard. When illuminated, DA1 indicates activity on SCSI chan- nel A and DA2 indicates activity on SCSI channel B.

SCSI Channel Activity LEDs

(DA1/DA2)

State	System Status
On	SCSI Channel Active
Off	SCSI Channel Inactive

POST Code LEDs

Eight surface-mounted LEDs are located near one end of the 1UIPMI slot. These LEDs are used to provide POST code information. See the diagrams below for reading the LEDs and refer to Appendix B for a complete list of POST codes.

↑

Toward edge of board

1

Reading the POST Code LEDs:

When on, each of the eight separate LEDs represent the value of the number shown

DB1-4

2

beside it in the diagram on the left. Add up

4 8

1

the numerical values of each illuminated LED in the DB5-DB8 column to get the high

DB5-8

2

(left) digit and those in the DB1-DB4 column

4 8

Example:

1

to get the low (right) digit of the correspond- ing POST code.

Example:

The example on the left indicates a hexa-

DB1-4

2

decimal POST code of C6. This is deter-

4 8

1

mined in the following manner:

DB1-DB4 (low digit): 4 + 2 = 6

DB5-8

2

DB5-DB8 (high digit): 8 + 4 = 12

4 8

= Illuminated LED (1)

= Unilluminated LED (0)

(decimal 12 = hexidecimal C)

Decimal	Hexidecimal Equivalent
0-9	0-9
10	A
11	B
12	C
13	D
14	E
15	F

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