Promise Technology EX4650 Manual do Utilizador Página 172

  • Descarregar
  • Adicionar aos meus manuais
  • Imprimir
  • Página
    / 232
  • Índice
  • MARCADORES
  • Avaliado. / 5. Com base em avaliações de clientes
Vista de página 171
SuperTrak EX Series User Manual
160
RAID 6 – Block and Double Parity Stripe
RAID level 6 stores dual parity data is rotated across the physical drives along
with the block data. A RAID 6 logical drive can continue to accept I/O requests
when any two physical drives fail.
Figure 5. RAID 6 stripes all drives with data and dual parity
The total capacity of a RAID 6 logical drive is the smallest physical drive times the
number of physical drives, minus two.
Hence, a RAID 6 logical drive with (7) 100 GB physical drives will have a capacity
of 500 GB. A RAID 6 logical drive with (4) 100 GB physical drives will have a
capacity of 200 GB.
RAID 6 becomes more capacity efficient in terms of physical drives as the
number of physical drives increases.
RAID 6 provides double fault tolerance. Your logical drive remains available when
up to two physical drives fail.
RAID 6 is generally considered to be the safest RAID level.
A RAID 6 on SuperTrak consists of 4 to 16 physical drives.
Double Distributed (P and Q) Parity
physical drives
Data
Blocks
Vista de página 171
1 2 ... 167 168 169 170 171 172 173 174 175 176 177 ... 231 232

Comentários a estes Manuais

Sem comentários