4.Verify the disk operational state. If a hard failure has occurred, the operational state appears as 
(Failed). A disk with an impending failure indicates Good status until the condition of the disk drive degrades enough to become a hard failure.
5.Verify that the Requested usage and Actual usage boxes display Ungrouped (Figure 9 (page 4)).
Figure 9 Verifying disk group status
CAUTION: Both fields must display Ungrouped before you remove the disk drive.
If both fields display Ungrouped, proceed to Step 7.
Otherwise, continue with Step 6.
6.For an impending failure, you must ungroup the disk before you remove it:
Only ungroup one disk at a time. Before you ungroup a disk, verify that leveling is not in progress and that sufficient free space is available. After you ungroup the disk, verify the status of the disk group before continuing. For more information about leveling and free space, see the Enterprise Virtual Array configuration best practices white paper for your array model.
a.Click Ungroup.
b.Click Ungroup in background.
A dialog box indicates that the Operation succeeded. This indicates that the ungroup operation has been initiated. You can monitor the progress of the ungroup on the Disk Drive Properties window.
c.Click the Disk Drive tab and monitor the ungroup progress in the Migration progress box (Figure 10 (page 4)).
Figure 10 Monitoring ungroup progress
When the ungroup is complete, continue with Step 7.
The ungrouping process can take up to several hours to complete. The duration depends on the capacity of the disk and the level of storage system activity.
If, after attempting to ungroup the disk, the Requested usage and Actual usage boxes do not display Ungrouped or the Migration progress box does not display 100%, contact your
7.Click Remove to prepare the disk for removal. The status indicators on the disk will flash to help you locate the disk. You can now proceed to “Removing a disk drive” (page 5).
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