User`s manual

The Introduction of RAID A-7
User’s Manual
RAID 3 3
!
Parallel transfer
with parity
!
Very high Read data
transfer rate
!
Very high Write data
transfer rate
!
Excellent performance
for large, sequential data
requests
!
Low ratio of ECC
(Parity) disks to data
disks means high
efficiency
!
Doesn’t support
multiple,
simultaneous
Read and Write
requests
!
Transaction rate
equal to that of a
single disk drive
at best (if
spindles are
synchronized)
RAID 4 3
!
Independent Data
disks with shared
parity disk
!
Very high Read data
transaction rate
!
High aggregate Read
transfer rate
!
Low ratio of ECC
(Parity) disks to data
disks means high
efficiency
!
Worst Write
transaction rate
and Write
aggregate
transfer rate
!
RAID 5 3
!
Independent Data
disks with
distributed parity
blocks
!
Highest Read data
transaction rate
!
Medium Write data
transaction rate
!
Best cost/performance
for transaction-oriented
networks
!
Supports multiple,
simultaneous Read and
Write
!
Low ratio of ECC
(Parity) disks to data
disks means high
efficiency
!
Write
performance is
slower than
RAID 0 or
RAID1
Note: Hot Rod 100 Pro only supports RAID level 0, 1, and 0+1 currently.