- 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
Disk groups in a pool
For better efficiency and performance, use similar disk groups in a pool.
- Disk count balance: For example, with 20 disks, it is better to have two 8+2 RAID-6 disk groups than one 10+2 RAID-6 disk group and one 6+2 RAID-6 disk group.
- RAID balance: It is better to have two RAID-5 disk groups than one RAID-5 disk group and one RAID-6 disk group.
- In terms of the write rate, due to wide striping, tiers and pools are as slow as their slowest disk groups.
- All disks in a tier should be the same type.
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