Former Terminology In Release 8.1 And Earlier; Data Protection Level; Setting A Data Protection Level For A Volume - HP StorageWorks P4000 User Manual

capacity utilization and similar high availability to Network RAID-10 and Network RAID-10+1. Because
data is stored redundantly on different storage systems, all data protection levels are tied to the number
of available storage systems in a cluster.

Former terminology in release 8.1 and earlier

Before release 8.5, you configured volumes with replication levels.
Volume Replication Level
None
2–Way replication
3–Way replication
4–Way replication
–
–

Data protection level

Six data protection levels are available, depending upon the number of available storage systems in
the cluster.
Table 40 Setting a data protection level for a volume
With this number of
available storage
systems in cluster
1
2
3
At least 4
Data Protection Level
Network RAID-0 (None)
Network RAID-10 (2–Way Mirror)
Network RAID-10+1 (3–Way Mirror)
Network RAID-10+2 (4–Way Mirror)
Network RAID-5 (Single Parity) (new)
Network RAID-6 (Dual Parity) (new)
Select any of these data protection
levels
• Network RAID-0 (None)
• Network RAID-0 (None)
• Network RAID-10 (2–Way Mirror)
• Network RAID-0 (None)
• Network RAID-10 (2-Way Mirror)
• Network RAID-10+1 (3-Way Mirror)
• Network RAID-0 (None)
• Network RAID-10 (2-Way Mirror)
• Network RAID-10+1 (3-Way Mirror)
• Network RAID-10+1 (4-Way Mirror)
• Network RAID-5 (Single Parity)
For this number of copies
• One copy of data in the cluster.
• One copy of data in the cluster.
• Two copies of data in the cluster.
• One copy of data in the cluster.
• Two copies of data in the cluster.
• Three copies of data in the cluster.
• One copy of data in the cluster.
• Two copies of data in the cluster.
• Three copies of data in the cluster.
• Four copies of data in the cluster.
• Data striped on three storage systems
and parity stored on fourth storage
system.
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