HP P6000 SmartStart Storage Software - Manual (Page 36)

virtual disk's disk group. Individual data blocks and copies of data blocks are written to different
physical disks to provide redundancy.
Vraid5
A virtual disk with Vraid5 provides a medium level of data protection. Overall, it provides a good
balance of data protection, I/O performance, and efficient use of physical disk capacity. See also
Vraid overview .
Vraid5 uses RAID striping and parity checking. 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. A parity chunk is calculated from data chunks and written to the physical disks.
If one of the data chunks becomes corrupted, the data can be reconstructed from the parity chunk
and the remaining data chunks.
Vraid6
A virtual disk with Vraid6 provides good speed and the highest redundancy. Vraid6 support is
dependent on the controller software version. See the HP P6000 Enterprise Virtual Array
Compatibility Reference. See also
Vraid overview .
Vraid6 uses RAID striping and dual parity checking. This means the storage system breaks
application server data into chunks and write the chunks in stripes across all of the physical disks
in the virtual disk's disk group.
A parity chunk is also calculated from data chunks and written twice to different physical disks. If
data chunks become corrupted, the storage system can automatically reconstruct the data from the
36 HP P6000 SmartStart concepts