User's Guide

Making Hot Spares by Easy Configuration

This section describes the information on Hot Spares to be made by the Easy Configuration.

Number of Hot Spares

The number of Hot Spares is defined by the number of unused Physical Devices connected to the RAID

Controller and the number of Physical Devices used for Logical Drives. The number of Hot Spares results from

subtracting [Number of Physical Devices specified for Logical Drives] from [Unused Physical Device count] in

step 2/3 of the [Easy Configuration...] wizard of RAID Viewer or "

econfig" command of raidcmd.

The maximum number of Hot Spares that can be created is 8 for N8103-109/128/134/135

RAID Controllers.

Easy Configuration will fail if you leave more than 8 Physical Devices for Hot Spares.

Physical Devices used as Hot Spares

Physical Devices of larger capacities are preferentially used as Hot Spares. Among Physical Devices of the

same capacity, Physical Devices of larger Physical Device Numbers are preferentially used as Hot Spares.

Ex.: For the example shown below, Physical Devices 1 - 7 can be used in Easy Configuration to make two Hot

Spares. Three Physical Devices have the largest capacity of 150GB. Accordingly, use Physical Devices 5 and

6 of larger Physical Device Numbers among the three Physical Devices as Hot Spares.

The capacity of the largest Physical Device is 150GB and there are three such Physical Devices. Use 5 and 6

Physical Devices.

Figure 19 Assigning Hot Spares in Easy Configuration

Physical Devices in which S.M.A.R.T. errors are detected cannot be used to make Hot Spares.

Modes of Hot Spares

The Easy Configuration can only make Dedicated Hot Spares but cannot make Global Hot Spares.

If more than one Logical Drive is created, the Dedicated Hot Spare can be used for all Logical Drives to be

created.

Physical

Device 1

100GB

Physical

Device 2

100GB

Physical

Device 3

150GB

Physical

Device 4

100GB

Physical

Device 5

150GB

Physical

Device 6

150GB

Physical

Device 7

100GB

Hot Spare