Hp Command View EVA Software Instrukcja Użytkownika Pobierz pdf (Strona 37)

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

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Hp Command View EVA Software Instrukcja Użytkownika Strona 37