iSCSI-to-SATA II RAID Subsystem
User Manual
13
RAID Management
The subsystem can implement several different levels of RAID technology. RAID levels
supported by the subsystem are shown below.
RAID Level
Description
Min. Drives
0
Block striping is provide, which yields
higher performance than with individual
drives. There is no redundancy.
1
1
Drives are paired and mirrored. All data is
100% duplicated on an equivalent drive.
Fully redundant.
2
N-way
mirror
Extension of RAID 1 level. It has N copies of
the disk.
N
3
Data is striped across several physical
drives. Parity protection is used for data
redundancy.
3
5
Data is striped across several physical
drives. Parity protection is used for data
redundancy.
3
6
Data is striped across several physical
drives. Parity protection is used for data
redundancy. Requires N+2 drives to
implement because of two-dimensional
parity scheme
4
0 + 1
Mirroring of the two RAID 0 disk arrays.
This level provides striping and redundancy
through mirroring.
4
10
Striping over the two RAID 1 disk arrays.
This level provides mirroring and
redundancy through striping.
4
JBOD
The abbreviation of “Just a Bunch Of Disks”.
JBOD needs at least one hard drive.
1
