Vdisk states

IBM Storage Scale RAID reports vdisk states, which are displayed using the mmlsvdisk command and also on the mmlsrecoverygroup command if the -L option is used. You can also use the IBM Storage Scale System 3200 GUI to display vdisk states. The state of vdisks is displayed in the Arrays > Volumes view.

Vdisks are normally in the ok state, which indicates that the vdisk is fully functional with full redundancy. When a pdisk failure affects a specific vdisk, the vdisk state will be reported as degraded until the affected tracks have been rebuilt onto spare space.

When enough pdisks have failed that the specific vdisk has no redundancy left, the vdisk state will be reported as critical until the critically affected tracks have been rebuilt onto spare space. If the system uses up all the available spare space while a vdisk is in the degraded or critical state, the state will be followed by (need spare), which indicates that rebuild activity is stalled, and will resume once the failed pdisks have been replaced.