User`s manual

Biostar T
Biostar TBiostar T
Biostar T-
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-Series
SeriesSeries
Series TF
TFTF
TForce4
orce4orce4
orce4 SLI
SLI SLI
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.
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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.
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