User's Guide

69
Capacity of Logical Drive
The capacity of a Logical Drive to be created is defined by the RAID Level and the capacities of Physical
Devices used for the Logical Drive.
The Easy Configuration uses the entire areas of the Physical Devices to create a Logical Drive.
When a single Logical Drive is created by using Physical Devices of different capacities, the smallest capacity
is applied among those of the Physical Devices.
Ex.: If Physical Devices 1 - 7 of different capacities can be used in Easy Configuration to create two Logical
Drives, use Physical Devices 1 - 4 and 5 - 7 to create Logical Drives #1 and #2, respectively. The capacity of
each Logical Drive is defined by the smallest capacity among those of the Physical Devices for the Logical
Drive.
Figure 18 Capacities of Logical Drives in Easy Configuration
Items set for Logical Drive
The values of other selection items set for a Logical Drive to be created are defined as shown in the table
below.
Selection item
Value
Stripe Size Uses the default value set for the RAID Controller. (The value varies depending on the
type of the RAID Controller.)
Cache Mode Uses the default value set for the RAID Controller. (The value varies depending on the
type of the RAID Controller.)
Initialize Mode Full
Logical
Drive #1
150GB
RAID 5
Logical
Drive #2
200GB
RAID 5
Physical
Device 1
50GB
Physical
Device 2
50GB
Physical
Device 3
150GB
Physical
Device 4
100GB
Physical
Device 5
100GB
Physical
Device 6
100GB
Physical
Device 7
150GB
Only 50GB is used in
each Physical Device (3
and 4) because the
smallest capacity is
50GB (remaining
capacities 100GB and
50GB are not used in 3
and 4, respectively).
Only 100GB can be
used in Physical
Device 7 because the
smallest capacity is
100GB in the Physical
Devices. (Remaining
50GB is not used.)