Nraid; Jbod; Figure 1 - 3 Jbod - Compaq External RAID Controller & Subsystem Infortrend Operation Manual

configure a logical volume.
RAID 10, 30, and 50.
RAID Level

NRAID

RAID 0
RAID 1 (0+1)
RAID 3
RAID 5
NRAID
Disk Spanning
Figure 1 - 2 NRAID
2 G B H a r d D r i v e
+
3 G B H a r d D r i v e
+
1 G B H a r d D r i v e
+
2 G B H a r d D r i v e
Logical
2 + 3 + 1 + 2 = 8 G B
Drive
L o g i c a l D r i v e

JBOD

Single Drive Control

Figure 1 - 3 JBOD

2 GB
=
L o g ic a lD riv e
3 GB
=
L o g ic a lD riv e
1 GB Har d Dr i v e
1 GB =
L o g ic a lD riv e
2 GB =
L o g ic a lD riv e
Functional Description
Performance Sequential
Drive
R: Highest
W: Highest
R: High
W: Medium
R: High
W: Medium
R: High
W: Medium
NRAID stands for Non-RAID. The capacity of all
the drives is combined to become one logical
drive (no block striping).
capacity of the logical drive is the total capacity of
the physical drives. NRAID does not provide
data redundancy.
2 GB Har d Dr i v e
3 GB Har d Dr i v e
2 GB Har d Dr i v e
There are more combinations than
Drive
R: High
W: Highest
R: Medium
W: Low
R: Medium
W: Low
R: High
W: Low
NRAID
Minimum 1
Disks required
Capacity N
Redundancy No
JBOD
Minimum
Disks required
Capacity
Redundancy
JBOD stands for Just a Bunch of Drives. The
controller treats each drive as a stand-alone
disk, therefore each drive is an independent
logical drive. JBOD does not provide data
redundancy.
Performance Random
In other words, the
1
1
No
1-3