- 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 APEX AIOps Infrastructure Observability
- 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
Operating with a single controller
An ME5 system with a single controller module does not offer a redundant configuration. If the controller fails, this leaves the system at risk for data unavailability.
A single-controller system defaults to write-through caching, in which data is written directly to disks rather than to nonvolatile storage. This setting cannot be changed in a single-controller system.
NOTE:If you are operating a system with a single controller, some functionality that is described in the documentation may be unavailable or not applicable to your system. For example, only one storage pool can exist and information about controller failover and recovery is not applicable.
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