Intel Matrix Storage Manager Quick Guide for Acer Selected Veriton PC V1.1
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RAID1 (mirroring)
•
RAID1 creates an
exact copy (or mirror)
of a set of data on two or more
disks when
reliability
is more important than data capacity.
•
A classic RAID1 mirrored pair contains two disks, which increases
reliability exponentially over a single disk.
o
Mirroring allows continued operation of the system in the event of
one drive or array failing.
o
Restoration can be performed using the mirrored copy.
o
I/O performance may suffer during reconstruction due to the increased
activity between locations.
•
RAID1 volume capacity
= capacity of smallest HDD
•
Such an array can only be as large as the smallest member disk.
B lo c k 4
P h y s ic a l
d is k s
1 2 0 G B
P h y s ic a l
d is k s
1 2 0 G B
L o g ic a l
d is k s
1 2 0 G B
P h y s ic a l
d i s k s
L o g i c a l
d i s k
B lo c k 3
B lo c k 1
B lo c k 2
B lo c k 4
B lo c k 3
B lo c k 1
B lo c k 2
B lo c k 4
B lo c k 3
B lo c k 1
B lo c k 2
D is k 1
D is k 2
R A I D 1
RAID5 (striping with parity)
•
RAID5 uses block-level striping with parity data distributed across all
member disks.
•
A RAID5 array can withstand a single disk failure without losing data or
access to data.
•
RAID5 is a good all-round system that combines efficient storage with
excellent security and decent performance. It is ideal for file and
application servers.
•
RAID5 volume capacity
= [(number of HDDs) - 1] x (capacity of smallest HDD)
