Service manual

GS160/320 Component Removal and Replacement 4-13
4.3.2 Warm-Swapping a FRU
Only FRUs in partitioned GS160/320 systems can be placed in a warm-
swap state. In partitioned systems a QBB can be isolated and powered
off, thus putting it (and its FRUs) in a warm-swap state. To put the
FRU in the warm-swap state, shut down the operating system running
in the partition containing the target QBB and power off the partition.
Example 4– 1 Warm-Swap State (assumes the system is partitioned)
1. Shut down the operating system in the hard partition that contains the
FRU. If the target hard partition contains soft partitions, shut down each
instance of the operating system in each soft partition first before
proceeding to step 2.
2. Issue the SRM power off command from the console connected to the hard
partition that contains the FRU. In the case of a hard partition containing
soft partitions, this command must be issued from the lead console i.e. the
console that defines and initializes the soft partitions.
3. Put the OCP switch in the Secure position.
4. Remove the FRU.
NOTE: Procedures for warm-swap include a step that puts the OCP switch into
the Secure position to prevent remote users from powering on a powered
off partition. Placing the service switch on the PSM in the Service
position accomplishes the same thing.
NOTE: Only hard partitions can be powered off. To power off a partition
containing soft partitions, first shut down each instance of the
operating system and then issue the SRM power off command from the
lead console. The lead console in a partition is the one controlling the
hard partition.