Promise Technology ultratrak RM8000, Руководство пользователя

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Chapter 2: Getting Started
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RAID Conversion
Existing arrays can be converted to a different RAID level of equal or greater
capacity to add flexibility, redundancy or for tuning an array for a different storage
application. UltraTrak supports the following conversions:
From To Comments
RAID 30 Retains the same capacity but allows parity to be written
to separate drives.
RAID 5 Some reduction in performance, lower disk overhead.
RAID 3 Some reduction in performance, lower disk overhead.
RAID 0+1 Full redundancy instead of parity. 8 drives required.
RAID 50
RAID 0 Increases capacity and performance but loses data
redundancy.
RAID 50 Retains the same capacity but stripes parity all drives.
RAID 5 Some reduction in performance, lower disk overhead.
RAID 3 Some reduction in performance, lower disk overhead.
RAID 0+1 Full redundancy instead of parity. 8 drives required.
RAID 30
RAID 0 Increases capacity and performance but loses data
redundancy.
RAID 50
RAID 30 Increases performance. 6 or 8 drives required.
RAID 3 Retains the same capacity but allows parity to be written
to only one drive.
RAID 0+1 Full redundancy instead of parity. 4, 6 or 8 drives
required.
RAID 5
RAID 0 Increases the capacity and performance but loses the
data redundancy.
RAID 50
RAID 30 Increases performance. 6 or 8 drives required.
RAID 5 Retains the same capacity but stripes parity all drives.
RAID 0+1 Full redundancy instead of parity. 4, 6 or 8 drives
required.
RAID 3
RAID 0 Increases capacity and performance but loses data
redundancy.