IBM RS/6000 SP manual Removing and restoring switch resources

1Input 1 (BH-J3 for SPS)

2Input 2 (BH-J4 for SPS)

3Input 3 (BH-J5 for SPS)

Table 3-4. Setting switch clock sources

	Number of Logical				Master Clock Choice
Model	Frames			1			2			3
30x	1-4	L01-S00 =		i	L01-S00 =		1	L01-S00 =		2
		L02-S00 =		1	L02-S00 =		i	L02-S00 =		2
		L03-S00 =		1	L03-S00 =		2	L03-S00 =		i
		L04-S00 =		1	L04-S00 =		2	L04-S00 =		3
30x	5	L01-S00 =		i	L01-S00 =		1	L01-S00 =		2
		L02-S00	=	1	L02-S00	=	i	L02-S00	=	3
		L03-S00	=	1	L03-S00	=	3	L03-S00	=	i
		L04-S00	=	1	L04-S00	=	2	L04-S00	=	3
		L05-S00	=	2	L05-S00	=	2	L05-S00	=	3
40x	4-8	S01-S02=i			S01-S06=i			S01-S10=i
		All others		= 1	All others		= 2	All others		= 3

Note: On an 8-port switch, the clock always equals 0. See samples in /etc/SP.

Removing and restoring switch resources

This procedure can be performed to allow customer to use a switch feature while extended service actions are performed on an individual frame of a multi-frame system with the switch feature.

DO NOT PERFORM this procedure unless the required service operation will take the switch out of the switch configuration for a minimum of two hours (for example, a part must be ordered or a switch assembly or frame must be repeatedly powered on/off) and/or the customer specifically requests it.

Care should be taken to understand the consequences on any partitions that might be sharing switch resources. See ªViewing switch partitionsº on page 3-8.

Attention: This procedure is intended to allow the customer to use the switch feature during extended repair action. The customer must stop all parallel jobs prior to starting the repair. Once the repair is complete, the customer must stop all parallel jobs again to reconfigure the switch to include the resource again. If the service action is expected to be complete in a short period of time (for example, two hours or less), this additional interruption of all parallel jobs will probably cost the customer more time than was saved by use of the switch feature during that short period.

Removing a switch assembly from the active configuration

1.Identify the switch which is to be removed from the active configuration for an extended period of time. Display the clock selection for this switch assembly and record it for later use. See ªSelecting appropriate switch clocksº on page 3-6.

2.If the primary processor node (usually in Frame 1) is connected to the switch identified in step 1, the customer must select an available processor node to be the new primary processor node. The primary node is set by the Eprimary command. Refer to IBM RS/6000 SP: Administration Guide for more information.

3.If the master clock selected for the switch is from the switch assembly identified in Step 1, the customer must select a new master clock. Refer to ªSelecting appropriate switch clocksº on page 3-6.

4.Have customer stop all current parallel jobs and suspend all parallel jobs on the job queue.

5.Put circuit breaker at the front of switch assembly in the Off (`0') position.

Chapter 3. Service procedures 3-7