HP MSA 2040 CLI Reference Guide

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Read Ahead Size
Read-ahead cache setting:
• Disabled: Read-ahead is disabled.
• Adaptive: Adaptive read-ahead is enabled, which allows the controller to dynamically
calculate the optimum read-ahead size for the current workload.
• Stripe: Read-ahead is set to one stripe. The controllers treat non-RAID and RAID-1 vdisks
internally as if they have a stripe size of 512 KB, even though they are not striped.
• 512 KB, 1 MB, 2 MB, 4 MB, 8 MB, 16 MB, or 32 MB: Size selected by a user.
Type
• standard: Standard volume
• standard*: Destination of an in-progress volume copy and cannot be
mounted/presented/mapped until the copy is complete
• snap-pool: Snap-pool volume
• master volume: Master volume
• snapshot: Snapshot volume
• replication source: Source for an in-progress replication to a secondary volume
Class
• standard: Standard volume, not enabled for snapshots
• PTSNAP: Snapshot-related volume such as a master volume, snap pool, or snapshot
• Proxy: Destination of an in-progress replication from a remote volume, which when complete
will change to type snapshot
Qualifier
• N/A: Standard volume, master volume, snapshot, or snap pool.
• RSR: Replication-specific volume, such as a primary volume, secondary volume, replication
snapshot, or replication image.
• RSR (DRM Promoted Secondary): During an actual site failover (not a test failover), the
replication set's primary and secondary volumes are shown as primary volumes with a
primary-volume conflict. This qualifier enables host-based Storage Replication Adapter (SRA)
software to determine which volume is the failed-over secondary volume for disaster recovery
management (DRM). If both systems are online and the communication link between them is up,
both systems will show similar information. When the SRA completes a restore-replication or
reverse-replication operation, this volume will be shown as a secondary volume with the RSR
qualifier.
Volume Description
• For HP-UX, a text value (set in-band by a host application) that identifies the volume.
• Blank if not set.
WWN
World Wide Name of the volume, used by host-based Storage Replication Adapter (SRA) software
to identify the volume.
Health
• OK
• Degraded
• Fault
• Unknown
Health Reason
If Health is not OK, this field shows the reason for the health state.