Acer Veriton M661 User Manual page 8

Intel Matrix Storage Manager Quick Guide for Acer Selected Veriton PC V1.1
multiple controllers with
only one drive per controller
Very simple design
Easy to implement
RAID1
Twice the Read transaction
rate of single disks, same
Write transaction rate as
single disks
100 percent redundancy of data
means no rebuild is necessary
in case of a disk failure, just
a copy to the replacement disk
Transfer rate per block is
equal to that of a single disk
Under certain circumstances,
RAID1 can sustain multiple
simultaneous drive failures
Simplest RAID storage
subsystem design
RAID5
Highest Read data transaction
rate
Medium Write data transaction
rate
Low ratio of ECC (parity)
disks to data disks means high
efficiency
Good aggregate transfer rate
RAID10
Very high I/O rates are
achieved by striping RAID1
segments
Excellent solution for sites
that would normally use RAID1
8/21
Highest disk overhead of all
RAID types (100%) —
inefficient
May not support hot-swap of
failed disk when implemented
using software RAID
Most complex controller
design
Difficult to rebuild in the
event of a disk failure (as
compared to RAID 1)
Individual block data
transfer rate same as single
disk
Very limited scalability at a
very high inherent cost
Expensive to maintain