- Notes, cautions, and warnings
- Getting started
- System concepts
- Storage environment
- Virtual storage
- Linear storage
- Disk groups
- RAID levels
- ADAPT
- Disk group utilities
- SSDs
- Spares
- Pools
- Changing pool settings
- Volumes and volume groups
- Volume cache options
- Overcommitting volumes
- About automated tiered storage
- Initiators, hosts, and host groups
- CHAP
- Host ports
- Attaching volumes to hosts
- Operating with a single controller
- Snapshots
- Copying volumes or snapshots
- Reconstruction
- Quick rebuild
- Updating firmware
- Managed logs
- LDAP
- DNS settings
- Peer connections
- Replication
- Full disk encryption
- Rescanning disks
- Clearing disk metadata
- Data protection during failover to a single controller
- SupportAssist
- About CloudIQ
- Event history
- Audit logs
- System metrics
- Dashboard
- Provisioning
- Working with volumes
- Volumes table
- Data protection table
- Creating volumes
- Modifying volumes
- Deleting volumes and snapshots
- Attaching volumes to hosts
- Detaching volumes from hosts
- Expanding volumes
- Rolling back virtual volumes
- Creating snapshots
- Resetting snapshots
- Copying volumes or snapshots
- Aborting a volume copy
- Add data protection
- Creating a replication set
- Modifying a replication set
- Deleting a replication set
- Initiating or scheduling a replication
- Suspending a replication
- Aborting a replication set
- Resuming a replication
- Managing replication schedules
- Working with hosts
- Working with volumes
- Settings
- Maintenance
- Other management interfaces
- Administering a log-collection system
- Settings changed by restoring defaults
- System configuration limits
- Best practices
- Glossary of terms
Dell PowerVault ME5 Series Administrator's Guide
Reconstruction
If one or more disks fail in a disk group, adequate disks remain in the disk group for data integrity, and sufficient spare capacity is available, the storage system automatically uses the spare capacity to reconstruct the disk group. Disk group reconstruction does not require I/O to be stopped, so volumes can continue to be used while reconstruction is in progress.
If sufficient spare capacity is not available, reconstruction does not start automatically. For RAID levels other than ADAPT, to start reconstruction manually, replace each failed disk with a compatible disk. If the dynamic spares feature is not enabled, designate each replacement disk as a spare. If the dynamic spares feature is enabled, the storage system rescans the bus, finds the new disk, automatically designates it a spare, and starts reconstructing the disk group (as described in Spares).
For virtual storage, reconstruction of all disk groups uses a quick-rebuild feature. For more information, see Quick rebuild.
For descriptions of LED states, such as for disk failure and reconstruction, see the related hardware documentation.
NOTE Reconstruction can take hours or days to complete, depending on the disk group RAID level and size, disk speed, host I/O activity, and other processes running on the storage system.
At any time after disk failure, you can remove the failed disk and replace it with a new disk of the same type in the same slot.
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