Backplane/Centerplane
Option #	Manufacturing Part #	Description	Previous Part #
n/a	370-5877 ¹	Starcat Service Cart, for storage of FRUs during centerplane replacement	n/a
n/a	501-4936 [F]	Sun Fireplane Interconnect	n/a
n/a	501-5179 ²	System Expander Board	n/a
n/a	370-4012	CDC SRAM DIMM	n/a
n/a	501-5378 [F]	Centerplane Support Board FRU (IBM SDI5/6 ASIC)	n/a
n/a	501-6803 [F]	Sun Fireplane Interconnect	n/a
n/a	501-6818 [F]	Centerplane Support Board FRU (NEC SDI6 ASIC)	n/a
n/a	501-6835	System Expander Assembly	n/a
	501-6827 ³ [F]	System Expander Board	n/a
	370-4012	CDC SRAM DIMM	n/a
n/a	501-6884	System Expander Assembly	n/a
	501-6802 [F]	System Expander Board	n/a
	370-4012	CDC SRAM DIMM	n/a
n/a	501-7156 [F]	Centerplane Support Board FRU (NEC SDI7 ASIC)	n/a
n/a	501-7238 [F]	System Expander Board, L	n/a
n/a	540-3993 [F]	System Controller/Centerplane Support Board Carrier Plate	n/a
n/a	540-6291	System Controller/Centerplane Support Board Carrier Plate	n/a
n/a	541-0119 [F]	Carrier Plate (Slots 1 2 3 6 7 8 10 11 12 15 16 17)	n/a
n/a	541-0120	Carrier Plate (Slots 0 9)	n/a
n/a	541-0121 [F]	Carrier Plate (Slots 4 5 13 14)	n/a

¹ For centerplane replacements, it is highly recommended to order Starcat Service Carts. See How To article 1006123.1 - Service Cart Ordering Procedure

12K/20K: one service cart recommended
15K/25K: two service carts recommended

² Only 501-5179-20 (AXQ 6.3) is supported. 501-6827 is equivalent to 501-5179-20.
³ 501-6827 is a new part number assigned to 501-5179-20 in February 2004. (WO_28379)

Table Legend
[F] = Field Replaceable Unit (FRU) [C] = Customer Replaceable Unit (CRU) [S] = Supported, but can no longer be ordered with this system [N] = No longer supported for this system Price = Price this Part