BIOS BR256, User Manual, Page: 14 / 110

BIOS CORPORATION
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1.3 RAID Mode Explanation
● Any change of RAID mode will cause data rebuild and data lost.
①
RAID MODE 6
②
RAID MODE 0
③
RAID MODE 3
④
RAID MODE 5
Data
Drive
Parity Data
Drive
Data and
parity are
equally
distribute
d among
6 drives
The most bottom drive is used for Parity
It allows one drive failure while data is accessing.
The data residing in failed drive can be generated from the
rest of 5 drives
Data and Parity are distributed among 6 HDDs. Since there
is no assigned disk for parity, each drive shares the same
loading in data access.
Data
Drive
All drives are used for data recording
Data is segmented and equally distributed among 6 drives.
All 6 drives will be accessed while data is read or written.
The mode provides the highest performance among all
others.
At the same time, if one drive failed, the whole data will be
lost.
Data and
Parity are
divided by
six
portions
Comparing with RAID- 5 dual parity is applied providing
even higher reliability
Allow up to two drives failure but also scarify capacity of two
drives
CAUTION
M