Table of Contents
Advertisement
RAID 1:
Every read and write is actually carried out in parallel across 2 disk drives
in a RAID 1 array system. The mirrored (backup) copy of the data can
reside on the same disk or on a second redundant drive in the array. RAID 1
provides a hot-standby copy of data if the active volume or drive is
corrupted or becomes unavailable because of a hardware failure.
RAID techniques can be applied for high-availability solutions, or as a form
of automatic backup that eliminates tedious manual backups to more
expensive and less reliable media.
Features and Benefits
Drives: Minimum 2, and maximum is 2.
Uses: RAID 1 is ideal for small databases or any other application
that requires fault tolerance and minimal capacity.
Benefits: Provides 100% data redundancy. Should one drive fail,
the controller switches to the other drive.
Drawbacks: Requires 2 drives for the storage space of one drive.
Performance is impaired during drive rebuilds.
Fault Tolerance: Yes.
18
K
8
X
2
5
0
G
B
P
R
O
K
8
X
2
5
0
G
B
P
R
O
Advertisement
Table of Contents
