Biostar TF560 A2 Setup Manual - Page 23

Raid 1

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TF520 A2+/TF560 A2+ 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 21

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TF520 A2+/TF560 A2+
21
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