HP P6000 SmartStart Storage Software - Manual (Page 35)

Disk groups with large physical disks
IMPORTANT: If a disk group includes large physical disks (for example, 1 TB or larger), HP
recommends using Vraid6 for the virtual disks.
The recovery (reconstruction) time for virtual disks increases with the size of the physical disks in
the disk group. With Vraid1 or Vraid5, a second physical disk failure during the longer recovery
time could prevent a complete recovery. The use of Vraid6 reduces the risk.
Vraid0
A virtual disk with Vraid0 does not provide any data protection (redundancy). However, Vraid0
I/O, especially random I/O, is fast and uses the capacity of the underlying physical disks to the
fullest extent. See also
Vraid overview .
IMPORTANT: HP does not recommend using Vraid0 for virtual disks when high availability is
required. Consider Vraid0 only for noncritical storage.
Vraid0 uses RAID striping. This means the storage system breaks application server data into chunks
and writes the chunks in stripes across all of the physical disks in the virtual disk's disk group.
Vraid1
A virtual disk with Vraid1 provides a high level of data protection (redundancy). See also Vraid
overview .
Vraid1 uses RAID mirroring. This means the storage system breaks application server data into
chunks and writes the data and a copy of the data (a mirror) across all of the physical disks in the
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