AMCC 720-0138-00 Benutzerhandbuch

Naming a Unit

43

                                      

If you need to add a drive to be used as the hot spare, follow the instructions 
under “Adding a Drive” on page 58.

1

In 3DM, choose 

2

In the Available Drives list, select the drive you want as a hot spare by 
marking the checkbox in front of it’s Port number.

3

Click 

.

4

In the dialog box that appears, select the configuration type 

.

5

Click 

. 

You will see the spare appear at the top of the page, under 

.

Naming a Unit

Units can be given unique names to more easily identify them. A unit can be 
assigned a name when it is created. It can also be named or renamed at a later 
time.

1

Make sure the appropriate controller is selected in the drop-down list at 
the right of the menu bar.

2

Choose 

 from the menu bar in 3DM.

3

In  the 

section of the Controller Settings page, locate the unit 

for which you want to change the name.

3ware’s 9000 series RAID controllers use drive coercion so that drives from 

differing manufacturers and with slightly different capacities are more likely to be 
able to be used as spares for each other. Drive coercion slightly decreases the 
usable capacity of a drive that is used in redundant units.

The capacity used for each drive is rounded down to the nearest GB for drives 
under 45 GB (45,000,000,000 bytes), and rounded down to the nearest 5 GBytes 
for drives over 45 GB. For example, a 44.3 GB drive will be rounded down to 44 
GBytes, and a 123 GB drive will be rounded down to 120 GBytes. 

If you have 120 GB drives from different manufacturers, chances are that the 
capacity varies slightly. For example, one drive might be 122 GB, and the other 123 
GB, even though both are sold and marketed as “120 GB drives.” 3ware drive 
coercion uses the same capacity for both of these drives so that one could replace 
the other.