User's Guide

68
Physical Devices used for Logical Drives
Physical Devices of lower Physical Device Numbers are used preferentially for Logical Drives to be created
excluding those for making Hot Spares.
Ex. : If Physical Devices 1 - 7 can be used for Easy Configuration and Physical Device 3 is used as a Hot Spare,
Logical Drives #1 is created with Physical Devices 1, 2, and4 in the ascending order of Physical Device
Numbers and Logical Drives #2 is created with Physical Devices 5, 6, and 7.
Figure 16 Assigning Physical Devices in Easy Configuration 1
If more than one Logical Drive are created and the number of Physical Devices configuring a Logical Drive is
not equal to others, a larger number of Physical Devices should be assigned to a Logical Drive having a
smaller logical number.
Ex.: If Physical Devices 1 - 7 can be used for Easy Configuration and two Logical Drives are created, Logical
Drives #1 and #2 are created with four Physical Devices 1 - 4 and three Physical Devices 5 - 7, respectively.
Figure 17 Assigning Physical Devices in Easy Configuration 2
Physical Devices in which S.M.A.R.T. errors are detected cannot be used to create Logical
Drives.
Physical
Device 1
Physical
Device 2
Physical
Device 3
Hot Spare
Physical
Device 4
Physical
Device 5
Physical
Device 6
Physical
Device 7
Logical
Drive #1
Logical
Drive #2
Physical
Device 1
Physical
Device 1
Physical
Device 2
Physical
Device 3
Physical
Device 4
Physical
Device 5
Physical
Device 6
Logical
Drive #1
Logical
Drive #2