Dell 0JYTRGA00 Personal Computer User Manual


 
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CHAPTER 4: USING YOUR DESKTOP
RAID Level 5
RAID level 5 uses data parity. RAID level 5 stripes both data and parity information
across three or more drives. It provides data striping at the byte level and also
stripe error correction information (rotating parity array). is results in excellent
performance and good fault tolerance.
If a drive failure occurs, subsequent read and write operations are directed to the
other surviving drives. A replacement drive can then be rebuilt using the data
from the surviving drives. Since data is duplicated on the primary and additional
drives, four 120 GB collectively have a maximum of 360 GB on which to store
data.
A1
B1
C1
Dp
A2
B2
Cp
D1
A3
Bp
C2
D2
Ap
B3
C3
D3
RAID Level 10
A RAID 10 array combines the high data access rate of a RAID level 0 array and the
data protection (redundancy) of a RAID level 1 mirror by striping data across two
drives and mirroring that striped data on a set of two drives.
RAID 1+
0
If a drive failure occurs, subsequent read and write operations are directed to the
other surviving drives. A replacement drive can then be rebuilt using the data
from the surviving drives. Also, because data is duplicated on the primary and
additional drives, four 120 GB collectively have a maximum of 240 GB on which
to store data.