Foxconn B75M Series User Manual page 74

RAID 0 (Stripe)
RAID 0 reads and writes sectors of data interleaved among multiple drives. If any disk
mem�er fails, it affects the entire array. The disk array data capacity is equal to the
num�er of drive mem�ers times the capacity of the smallest mem�er. The striping
block size can be set from 4KB to 128KB. RAID 0 does not support fault tolerance.
RAID 1 (Mirror)
RAID 1 writes duplicate data onto a pair of drives and reads �oth sets of data in
parallel. If one of the mirrored drives suffers a mechanical failure or does not respond,
the remaining drive will continue to function. Due to redundancy, the drive capacity of
the array is the capacity of the smallest drive. Under a RAID 1 setup, an extra drive
called the "spare drive" can �e attached. Such a drive will �e activated to replace a
failed drive that is part of a mirrored array. Due to the fault tolerance, if any RAID 1
drive fails, data access will not �e affected as long as there are other working drives in
the array.
RAID 5 (Parity)
RAID � provides data striping at the �yte level and also stripes error correction
information. This results in excellent performance and good fault tolerance. Level � is
one of the most popular implementations of RAID.
RAID 10 (0+1)
RAID 10 is a combination of striping and mirroring. This configuration provides optimal
speed and relia�ility, �ut you need four SATA hard disks.
Comparison Table :
Solution Hard Disks No.
RAID0 >=2
RAID1
RAID� >=3
RAID10 >=4
(Even num�er)
Capacity
All
2 �0%
N-1
Smallest
*2
Performance Relia�ility
Highest Dangerous
Read faster Excellent
Read faster Good
Write slower
High Excellent
6�
Application
Look for speed
100% Data �ackup
Limited �udget
Unlimited �udget