AMCC 720-0138-00 Naming a Unit, To specify a hot spare, To name or rename a unit through 3DM

Naming a Unit

Note: 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.

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

To specify a hot spare

1In 3DM, choose Management > Maintenance.

2In the Available Drives list, select the drive you want as a hot spare by marking the checkbox in front of it’s Port number.

3Click Create Unit.

4In the dialog box that appears, select the configuration type Spare.

5Click Ok.

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

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.

To name or rename a unit through 3DM

1Make sure the appropriate controller is selected in the drop-down list at the right of the menu bar.

2Choose Management > Controller Settings from the menu bar in 3DM.

3In the Unit Names section of the Controller Settings page, locate the unit for which you want to change the name.

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