HP MSA 1040 HP MSA 1040 SMU Reference Guide (762784-001, March 2014) - Page 30

About Configuration View icons The Configuration View panel uses the following icons to let you view physical and logical components of the storage system. Table 9 Configuration View icons Icon Meaning Icon Meaning Show all subcomponents Snapshot Hide all subcomponents Snap pool Show the component's subcomponents Replication-prepared volume Hide the component's subcomponents Local primary volume Storage system Local secondary volume Enclosure Local replication image Host/initiator Remote primary volume Vdisk Remote secondary volume Standard or master volume Remote replication image About disk failure and vdisk reconstruction Vdisk reconstruction does not require I/O to be stopped, so the vdisk can continue to be used while the Reconstruct utility runs. Vdisk reconstruction starts automatically when all of the following are true: • One or more disks fail in a fault-tolerant vdisk (RAID 1, 3, 5, 6, 10, or 50) • The vdisk is still operational • Compatible spares are available The storage system automatically uses the spares to reconstruct the vdisk. A compatible spare has a capacity equal to or greater than the smallest disk in the vdisk, has enough capacity to replace a failed disk, and is the same type ( enterprise SAS or midline SAS) as those disks. If no compatible spares are available, reconstruction does not start automatically. To start reconstruction manually, replace each failed disk and then do one of the following: • Add each new disk as either a dedicated spare or a global spare. Remember that a global spare might be taken by a different critical vdisk than the one you intended. When a global spare replaces a disk in a vdisk, the global spare's icon in the enclosure view changes to match the other disks in that vdisk. • Enable the Dynamic Spare Capability option to use the new disks without designating them as spares. • Change a dedicated spare from a different vdisk to either a global spare or a dedicated spare for the degraded vdisk. RAID-6 reconstruction behaves as follows: • During online initialization, if one disk fails, initialization continues and the resulting vdisk will be degraded (FTDN status). After initialization completes, the system can use a compatible spare to reconstruct the vdisk. • During online initialization, if two disks fail, initialization stops (CRIT status). The system can use two compatible spares to reconstruct the vdisk. • During vdisk operation, if one disk fails and a compatible spare is available, the system begins to use that spare to reconstruct the vdisk. If a second disk fails during reconstruction, reconstruction continues until it is complete, regardless of whether a second spare is available. If the spare fails during reconstruction, reconstruction stops. • During vdisk operation, if two disks fail and only one compatible spare is available, the system waits five minutes for a second spare to become available. After five minutes, the system begins to use that spare to reconstruct one disk in the vdisk (referred to as "fail 2, fix 1" mode). If the spare fails during reconstruction, reconstruction stops. 30 Getting started