To Next Page

To Previous Page

24 | Chapter 4: Useful Help

Data are stored twice by wring them to both the data disk

(or set of data disks) and a mirror disk (or set of disks) . If

a disk fails, the controller uses either the data drive or the

mirror drive for data recovery and connues operaon. You

need at least 2 disks for a RAID 1 array.

Features and Benets

• Drives: Minimum 2, and maximum is 2.

• Uses: RAID 1 is ideal for small databases or any other applicaon that requires fault

tolerance and minimal capacity.

• Benets: 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.

RAID 10 combines the advantages (and

disadvantages) of RAID 0 and RAID 1 in one

single system. It provides security by mirroring

all data on a secondary set of disks (disk 3 and

4 in the drawing below) while using striping

across each set of disks to speed up data

transfers.

Features and Benets

• Drives: Minimum 4, and maximum is 6 or 8, depending on the plaorm.

• Benets: Opmizes for both fault tolerance and performance, allowing for automac

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.

Biostar A68MHE User Manual

Questions and Answers: