Disk Level Data Protection; Disk Protection Using Raid; Large Single-System Sata Cluster; Disk Raid Consistency - HP StoreVirtual 4000 User Manual

Figure 46 Best Practice Summary for well-configured SAN
Expand the management group in the summary to see the individual categories that have
recommended best practices. The summary displays the status of each category and identifies any
conditions that fall outside the best practice. Click on a row to see details about that item's best
practice.

Disk level data protection

Disk level data protection indicates whether the storage system has an appropriate disk RAID level
set. For more information about configuring disk RAID levels, see
(page 30).

Disk protection using RAID

Data protection is provided on an individual storage system by configuring RAID at any level other
than 0. For a description of RAID levels, see

Large single-system SATA cluster

If you are using a single large SATA storage system in a cluster, data protection is provided by
configuring RAID 6 on that system. In addition to redundancy during normal operation, RAID 6
further protects the RAID array against data loss during degraded mode by tolerating one additional
drive failure during this vulnerable stage.

Disk RAID Consistency

The best results for availability, reliability, and performance are achieved by using the same disk
RAID level for all storage systems in a cluster. Mixed RAID levels in clusters are allowed to support
a variety of administrative tasks. However, using the same RAID settings on all storage systems in
a cluster ensures optimum availability and performance. For more information, see
overview" (page

Cluster-level data protection

Clusters of two or more systems provide the highest data availability. Clustered storage systems
create the storage capacity for data volumes. Clusters are recommended to contain between 2
and 10 storage systems. See
1 10 Working with management groups
118).
"Clusters and storage systems" (page
"Planning the RAID configuration"
"RAID Levels" (page 28).
"Managers
132).