3DM 2 Online Help

Deleting a Unit
You delete a unit—either an array of disks, or a Single Disk—when you want to reconfigure the unit or use the drives for other purposes.
After you delete a unit, the drives appear in the list of Available Drives.

| Warning: When a unit is deleted, all of the data on that unit will be lost. The drives cannot be reassembled into the same unit because the data on it is erased. If you want to reassemble the drives into the same unit on another controller, use the Remove Unit button in 3DM instead of the Delete Unit button. Or, you can shut down the computer and physically move the drives to another 3ware RAID controller. When you restart your system, the controller will recognize the unit. For more information see Moving a Unit from One Controller to Another.

| Warning: When a unit is deleted, all of the data on that unit will be lost. The drives cannot be reassembled into the same unit because the data on it is erased. If you want to reassemble the drives into the same unit on another controller, use the Remove Unit button in 3DM instead of the Delete Unit button. Or, if you’re at the BIOS level already, you can shut down the computer and physically move the drives to another 3ware 9000 series RAID controller. When you restart your system, the controller will recognize the unit. For more information see Moving a Unit from One Controller to Another.

If you have incomplete drives, or drives that appear with a message such as “Unsupported DCB,” indicating that they were previously part of a unit on a 3ware 7000/8000 series controller, they must be deleted before you use them. (If you want to move a unit from a 7/8000 controller to a 9000 series controller, you must convert the drives first. For more information, see Moving a Unit from One Controller to Another.)
To delete a unit through 3DM

1 | Make sure the operating system is not accessing the unit you want to remove.

For example, make sure you are not copying files to the unit, and make sure that there are no applications with open files on that unit.

2 | Backup any data you want to keep.

3 | Unmount the unit.

This step is very important. If a unit is not unmounted and you delete it, it is the equivalent of physically yanking a hard drive out from under the operating system. You could lose data, the system could hang, or the controller could reset.
Under Windows, go to Start > Administrative Tools > Computer Management, and select Disk Management. Remove the logical drive letter for the unit.
Under Linux and FreeBSD, you can unmount the unit with this command:
umount <mount location>

4 | In 3DM, choose Management > Maintenance.

5 | In the Unit Maintenance section of the Maintenance page, select the unit you want to remove and click Delete Unit.

6 | When a message asks you to confirm, click OK.

Configuration information associating the drives with the unit is deleted, and the individual drives appear in the Available Drives list. You can now use them as part of another unit, or designate them as Spares, for use in a rebuild.
Show Unit Successfully Deleted through 3DM

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