B.2 I/O-to-Disk Backplane Connectors

There are three connectors between the I/O and disk backplane:

Power Blade Connector, J23 to J50. See Power Blade Connector
Two High-Speed Dock Connectors, J24 to J49, and J25 to J51. See High-Speed Dock Connectors, I/O-to-Disk Backplane (J24 to J49) Connector Pinouts and I/O-to-Backplane (J25 to J51) Connector Pinouts .

B.2.1 Power Blade Connector

This connector has ten blades and 20 signal pins, with a 30A limit per blade.

Table B-2 Power Blade Connector

Pin	Pin Name	Pin	Pin Name	Pin	Pin Name	Pin	Pin Name
A1	FAN4_CTL0	B1	FAN4_CTL0	C1	FAN4_CTL1	D1	FAN4_CTL1
A2	FAN3_CTL0	B2	FAN3_CTL0	C2	FAN3_CTL1	D2	FAN3_CTL1
A3	FAN2_CTL0	B3	FAN2_CTL0	C3	FAN2_CTL1	D3	FAN2_CTL1
A4	FAN1_CTL0	B4	FAN1_CTL0	C4	FAN1_CTL1	D4	FAN1_CTL1
A5	FAN0_CTL0	B5	FAN0_CTL0	C5	FAN0_CTL1	D5	FAN0_CTL1
			Blade 1				5V_DISK
			Blade 2				5V_DISK
			Blade 3				GND
			Blade 4				GND
			Blade 5				GND
			Blade 6				+12V
			Blade 7				GND
			Blade 8				+12V
			Blade 9				GND
			Blade 10				+12V

B.2.2 High-Speed Dock Connectors

Each disk drive uses two 111-circuit Hi-Speed Dock connectors. See in High-Speed Dock Connectors.

Figure B-2 High-Speed Dock Connectors

image:This graphic shows the high-speed dock connectors.

Table B-3 I/O-to-Disk Backplane (J24 to J49) Connector Pinouts

Pin	Pin Name	Pin	Pin Name	Pin	Pin Name
A1	FRONT_USB_P	B1	SHORT_PIN1	C1	POWER_BUTTON_L
A2	FRONT_USB_N	B2	P3_3V	C2	LOCATE_BUTTON_L
A3	5V_AUX	B3	5V_AUX	C3	P5V
A4	PS2_BATT_L	B4	GND	C4	GND
A5	DISK36_TX_P	B5	DISK36_RX_N	C5	DISK24_TX_P
A6	DISK36_TX_N	B6	DISK36_RX_P	C6	DISK24_TX_N
A7	DISK24_RX_N	B7	DISK12_TX_P	C7	DISK12_RX_N
A8	DISK24_RX_P	B8	DISK12_TX_N	C8	DISK12_RX_P
A9	DISK36_ACT_LED_L	B9	DISK24_ACT_LED_L	C9	DISK12_ACT_LED_L
A10	DISK13_ACT_LED_L	B10	DISK1_ACT_LED_L	C10	DISK0_ACT_LED_L
A11	DISK0_TX_P	B11	DISK0_RX_N	C11	DISK1_RX_P
A12	DISK0_TX_N	B12	DISK0_RX_P	C12	DISK1_RX_N
A13	DISK1_TX_N	B13	DISK13_RX_P	C13	DISK13_TX_N
A14	DISK1_TX_P	B14	DISK13_RX_N	C14	DISK13_TX_P
A15	DISK25_RX_P	B15	DISK25_TX_N	C15	DISK37_RX_P
A16	DISK25_RX_N	B16	DISK25_TX_P	C16	DISK37_RX_N
A17	DISK37_TX_N	B17	DISK2_RX_P	C17	DISK2_TX_N
A18	DISK37_TX_P	B18	DISK2_RX_N	C18	DISK2_TX_P
A19	DISK25_ACT_LED_L	B19	DISK37_ACT_LED_L	C19	DISK2_ACT_LED_L
A20	DISK38_ACT_LED_L	B20	DISK26_ACT_LED_L	C20	DISK14_ACT_LED_L
A21	DISK14_RX_P	B21	DISK14_TX_N	C21	DISK26_RX_P
A22	DISK14_RX_N	B22	DISK14_TX_P	C22	DISK26_RX_N
A23	DISK26_TX_N	B23	DISK38_RX_P	C23	DISK38_TX_N
A24	DISK26_TX_P	B24	DISK38_RX_N	C24	DISK38_TX_P
A25	DISK3_RX_P	B25	DISK3_TX_N	C25	DISK15_RX_P
A26	DISK3_RX_N	B26	DISK3_TX_P	C26	DISK15_RX_N
A27	DISK15_TX_N	B27	DISK27_RX_P	C27	DISK27_TX_N
A28	DISK15_TX_P	B28	DISK27_RX_N	C28	DISK27_TX_P
A29	DISK3_ACT_LED_L	B29	DISK15_ACT_LED_L	C29	DISK27_ACT_LED_L
A30	DISK16_ACT_LED_L	B30	DISK4_ACT_LED_L	C30	DISK39_ACT_LED_L
A31	DISK39_RX_P	B31	DISK39_TX_N	C31	DISK4_RX_P
A32	DISK39_RX_N	B32	DISK39_TX_P	C32	DISK4_RX_N
A33	DISK4_TX_N	B33	DISK16_RX_P	C33	DISK16_TX_N
A34	DISK4_TX_P	B34	DISK16_RX_N	C34	DISK16_TX_P
A35	DISK28_RX_P	B35	DISK28_TX_N	C35	DISK40_RX_P
A36	DISK28_RX_N	B36	DISK28_TX_P	C36	DISK40_RX_N
A37	DISK40_TX_N	B37	DISK5_RX_P	C37	DISK5_TX_N
A38	DISK40_TX_P	B38	DISK5_RX_N	C38	DISK5_TX_P
A39	DISK28_ACT_LED_L	B39	DISK40_ACT_LED_L	C39	DISK5_ACT_LED_L
A40	DISK41_ACT_LED_L	B40	DISK29_ACT_LED_L	C40	DISK17_ACT_LED_L
A41	DISK17_RX_P	B41	DISK17_TX_N	C41	DISK29_RX_P
A42	DISK17_RX_N	B42	DISK17_TX_P	C42	DISK29_RX_N
A43	DISK29_TX_N	B43	DISK41_RX_P	C43	DISK41_TX_N
A44	DISK29_TX_P	B44	DISK41_RX_N	C44	DISK41_TX_P
A45	3_3AUX_IN	B45	3_3AUX_IN	C45	3_3AUX_IN
A46	GND	B46	5V_DISK_SENSE_N	C46	GND
A47	3_3_AUX_SENSE_P	B47	5V_DISK_SENSE_P	C47	SP_I2C_CLK
A48	3_3_AUX_SENSE_N	B48	MAMMOTH_INT_L	C48	SP_I2C_DAT

Table B-4 I/O-to-Backplane (J25 to J51) Connector Pinouts

Pin	Pin Name	Pin	Pin Name	Pin	Pin Name
A1	12V_SENSE_P	B1	3_3AUX_POWERGOOD	C1	VDD_RTC
A2	12V_SENSE_N	B2	PS1_ENABLE_L	C2	PS0_ENABLE_L
A3	DISK6_RX_P	B3	DISK6_TX_N	C3	DISK18_RX_P
A4	DISK6_RX_N	B4	DISK6_TX_P	C4	DISK18_RX_N
A5	DISK18_TX_N	B5	DISK30_RX_P	C5	DISK30_TX_N
A6	DISK18_TX_P	B6	DISK30_RX_N	C6	DISK30_TX_P
A7	DISK6_ACT_LED_L	B7	DISK18_ACT_LED_L	C7	DISK30_ACT_LED_L
A8	DISK19_ACT_LED_L	B8	DISK7_ACT_LED_L	C8	DISK42_ACT_LED_L
A9	DISK42_RX_P	B9	DISK42_TX_N	C9	DISK7_RX_P
A10	DISK42_RX_N	B10	DISK42_TX_P	C10	DISK7_RX_N
A11	DISK7_TX_N	B11	DISK19_RX_P	C11	DISK19_TX_N
A12	DISK7_TX_P	B12	DISK19_RX_N	C12	DISK19_TX_P
A13	DISK31_RX_P	B13	DISK31_TX_N	C13	DISK43_RX_P
A14	DISK31_RX_N	B14	DISK31_TX_P	C14	DISK43_RX_N
A15	DISK43_TX_N	B15	DISK8_RX_P	C15	DISK8_TX_N
A16	DISK43_TX_P	B16	DISK8_RX_N	C16	DISK8_TX_P
A17	DISK31_ACT_LED_L	B17	DISK43_ACT_LED_L	C17	DISK8_ACT_LED_L
A18	DISK44_ACT_LED_L	B18	DISK32_ACT_LED_L	C18	DISK20_ACT_LED_L
A19	DISK20_RX_P	B19	DISK20_TX_N	C19	DISK32_RX_P
A20	DISK20_RX_N	B20	DISK20_TX_P	C20	DISK32_RX_N
A21	DISK32_TX_N	B21	DISK44_RX_P	C21	DISK44_TX_N
A22	DISK32_TX_P	B22	DISK44_RX_N	C22	DISK44_TX_P
A23	DISK9_RX_P	B23	DISK9_TX_N	C23	DISK21_RX_P
A24	DISK9_RX_N	B24	DISK9_TX_P	C24	DISK21_RX_N
A25	DISK21_TX_N	B25	DISK33_RX_P	C25	DISK33_TX_N
A26	DISK21_TX_P	B26	DISK33_RX_N	C26	DISK33_TX_P
A27	DISK9_ACT_LED_L	B27	DISK21_ACT_LED_L	C27	DISK33_ACT_LED_L
A28	DISK22_ACT_LED_L	B28	DISK10_ACT_LED_L	C28	DISK45_ACT_LED_L
A29	DISK45_RX_P	B29	DISK45_TX_N	C29	DISK10_RX_P
A30	DISK45_RX_N	B30	DISK45_TX_P	C30	DISK10_RX_N
A31	DISK10_TX_N	B31	DISK22_RX_P	C31	DISK22_TX_N
A32	DISK10_TX_P	B32	DISK22_RX_N	C32	DISK22_TX_P
A33	DISK34_RX_P	B33	DISK34_TX_N	C33	DISK46_RX_P
A34	DISK34_RX_N	B34	DISK34_TX_P	C34	DISK46_RX_N
A35	DISK46_TX_N	B35	DISK11_RX_P	C35	DISK11_TX_N
A36	DISK46_TX_P	B36	DISK11_RX_N	C36	DISK11_TX_P
A37	DISK34_ACT_LED_L	B37	DISK46_ACT_LED_L	C37	DISK11_ACT_LED_L
A38	DISK47_ACT_LED_L	B38	DISK35_ACT_LED_L	C38	DISK23_ACT_LED_L
A39	DISK23_RX_P	B39	DISK23_TX_N	C39	DISK35_RX_P
A40	DISK23_RX_N	B40	DISK23_TX_P	C40	DISK35_RX_N
A41	DISK35_TX_N	B41	DISK47_RX_P	C41	DISK47_TX_N
A42	DISK35_TX_P	B42	DISK47_RX_N	C42	DISK47_TX_P
A43	PS0_FAN_FAIL_L	B43	PS0_POWEROK	C43	PS1_POWEROK
A44	PS1_FAN_FAIL_L	B44	PS0_PRESENT_L	C44	PS2_POWEROK
A45	PS2_FAN_FAIL_L	B45	PS1_PRESENT_L	C45	PS0_FAIL
A46	PS0_VIN_GOOD_L	B46	PS2_PRESENT_L	C46	PS1_FAIL
A47	PS1_VIN_GOOD_L	B47	PS2_VIN_GOOD_L	C47	PS2_FAIL
A48	PS2_ENABLE_L	B48	SHORT_PIN4	C48	INTRUSION_SW

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