AMCC 720-0138-00 ユーザーズマニュアル

Configuring a New Unit

35

Configuration Options When Creating a Unit

This section provides an overview of the choices you have when configuring 
a new unit. For step-by-step instructions, see “Creating a Unit” on page 37.

When you configure a new unit, you specify the following:

Unit policies that affect how the unit will be handled

You can make some types of changes to the RAID configuration later, and 
you can change the unit name and the unit policies. For details, see “Changing 
An Existing Configuration” on page 50 and “Setting Unit Policies” on 
page 44.

You may include from one to four drives in the unit, depending on the number 
of drives available. (For information about how many drives to select for a 
given RAID level, see “Determining What RAID Level to Use” on page 10.)

Available drives are those that are not currently part of a unit. If you want to 
use drives that are currently part of a different unit, you must first delete that 
unit to make the drives available. (For details, see “Deleting a Unit” on 
page 54.) If drives are listed under “Incomplete Drives and Others,” they must 
be deleted before they can be used. 

If you want to add drives to be used in the unit, see “Adding a Drive” on 
page 58.

Available configuration types include RAID 0, RAID 1, RAID 5, RAID 10, 
and Single Disk. For information about the different RAID levels, see 
“Understanding RAID Concepts and Levels” on page 6.

                                      

Creating a unit erases all data on all drives. Although creating a RAID 1 

(mirror) creates a unit that will have a duplicate of data on both drives after it is put 
in use, creating a RAID 1 cannot be used to make a backup copy of data that 
currently exists on a single drive unless you migrate from a RAID 1 to two individual 
single disks.