IBM DS5000, IBM DS4000, and IBM DS3000 series storage systems provide functions that can be used with the system.
Diagnostics are automatically recovered by the system. After the controller run diagnostics option is used, check your managed disks (MDisks) to ensure that they were not set to degraded mode.
The controller disable data transfer option is not supported when a system is attached to IBM DS5000, IBM DS4000, or IBM DS3000 systems.
Do not set an array offline because you can lose access to the storage pool.
The array increase capacity option is supported, but the new capacity is not usable until the MDisk is removed from the storage pool and then added to the storage pool again. You might have to migrate data to increase the capacity.
You can redistribute logical drives or change ownership of the preferred path; however, these options might not take effect until a discovery is started on the system. You can use the detectmdisk command-line interface (CLI) command to restart a system discovery process. The discovery process rescans the Fibre Channel network to discover any new MDisks that might have been added to the system and to rebalance MDisk access across the available storage system ports.
You must use the controller reset option only if you are directed to do so by IBM Service and the alternate controller is functional and available to the SAN. The system reset is automatically recovered by the system.
Check your MDisks to ensure that they were not set to the degraded state during the controller reset process. You can enter the includemdisk CLI command to repair degraded MDisks.