- Notes, cautions, and warnings
- Overview of Unisphere
- Functionality supported by each OS type
- Capacity information
- Understanding resource usage
- Login authentication
- Understanding the system health score
- Manage jobs
- Unisphere for PowerMax alert monitoring recommendations
- Alerts
- Server alerts
- Understanding licenses
- Understanding user authorization
- Individual and group roles
- Roles
- User IDs
- Roles and associated permissions
- Roles for performing local and remote replication actions
- RBAC roles for SRDF local and remote replication actions
- RBAC roles for TimeFinder SnapVX local and remote replication actions
- Storage Management
- Understanding storage groups
- Understanding data reduction
- Understanding service levels
- Performance Impact
- Understanding storage templates
- Understanding Storage Resource Pools
- Understanding volumes
- Understanding disk groups
- Host Management
- Understanding hosts
- Understanding masking views
- Understanding port groups
- Understanding initiators
- Understanding PowerPath hosts
- Understanding mainframe management
- Data protection management
- Understanding Snapshot policy
- Understanding SRDF/Metro Smart DR
- Manage remote replication sessions
- Understanding SRDF groups
- Understanding migration
- Understanding Virtual Witness
- Understanding Open Replicator
- Open Replicator session options
- Understanding device groups
- Understanding TimeFinder/Mirror sessions
- Understanding TimeFinder SnapVX
- Understanding Performance Management
- Understanding Unisphere support for VMware
- Understanding eNAS
- Understanding iSCSI
- Understanding NVMe/TCP
- Understanding PowerMax File for storage systems
- Understanding serviceability
- Understanding PowerMax software system profiles and compliance
- Unisphere for PowerMax localized for Japanese market
- Where to get help
Dell Unisphere for PowerMax 10.0.1 Product Guide
Understanding Virtual Witness
The Virtual Witness feature supports a third party that the two storage systems consult when they lose connectivity with each other, that is, their SRDF links go out of service.
When SRDF links go out of service, the Witness helps to determine, for each SRDF/Metro Session, which of the storage systems should remain active (volumes continue to be read and write to hosts) and which goes inactive (volumes not accessible).
For additional information about vWitness, see the Dell SRDF/Metro vWitness Configuration Guide.
The following vWitness tasks can be performed from Unisphere.
- Adding a Virtual Witness
- Viewing Virtual Witness instances
- Viewing Virtual Witness instance details
- Enabling a Virtual Witness
- Disabling a Virtual Witness
- Removing a Virtual Witness
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