Raid Devices By Raid Type; Virtual Raid Devices; Planning The Raid Configuration; Data Protection - HP StorageWorks P4000 User Manual

RAID devices by RAID type

Each RAID type creates different sets of RAID devices.
of the variety of RAID devices created by the different RAID types as implemented on various storage
systems.
Table 11 Information in the RAID setup report
This item
Device Name
Device Type
Device Status
Subdevices

Virtual RAID devices

If you are using the VSA, the only RAID available is virtual RAID. After installing the VSA, virtual RAID
is configured automatically if you first configured the data disk in the VI Client.
HP recommends installing VMware ESX Server on top of a server with a RAID 5 or RAID 6
configuration.

Planning the RAID configuration

The RAID configuration you choose for the storage system depends on your plans for data fault
tolerance, data availability, and capacity growth.
CAUTION:
Plan your RAID configuration carefully. After you have configured RAID, you cannot change the RAID
configuration without deleting all data on the storage system.

Data protection

Keeping multiple copies of your data ensures that data is safe and remains available in the case of
disk failure. There are two ways to achieve data protection:
• Configure RAID 1, RAID 10, RAID 5, RAID 5 + spare, RAID 50, or RAID 6 within each storage
system to ensure data redundancy.
• Always use Network RAID to mirror data volumes across storage systems in a cluster, regardless
of RAID level, for added data protection and high availability.
56 Storage Configuration: Disk RAID and Disk Management
Table 11
Describes this
The disk sets used in RAID. The number and names of devices varies by
storage system and RAID level.
The RAID level of the device. For example, in a P4300 G2, RAID 5 displays
a Device Type of RAID 5 and subdevices as 8.
The RAID status of the device.
The number of disks included in the device.
on page 56 contains a description