Biostar T-Series
TForce4 SLI
User’s Manual
16
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.
Block 1
Block 2
Block 3
Block 1
Block 2
Block 3
RAID 0+1:
RAID 0 drives can be mirrored using RAID 1 techniques. Resulting in a RAID 0+1
solution for improved performance plus resiliency.
Features and Benefits
-
Drives:
Minimum 4, and maximum is 6 or 8, depending on the platform.
-
Benefits:
Optimizes for both fault tolerance and performance, allowing for
automatic redundancy. May be simultaneously used with other RAID levels
in an array, and allows for spare disks.
-
Drawbacks:
Requires twice the available disk space for data redundancy,
the same as RAID level 1.
-
Fault Tolerance:
Yes.
Block 2
Block 4
Block 6
Block 1
Block 3
Block 5
Block 2
Block 4
Block 6
Block 1
Block 3
Block 5
