Windows Server
2012 might incorrectly notify you that a device is in use when you
try to log out from an iSCSI target. This issue can occur even though
no application is using files on any volume associated with the iSCSI
target.
Consequently, the relevant task wizards in Auto-Snapshot Manager (or ASMCLI commands)
such as Unmount, Logoff, or Delete might
display a Volume in use error.
If you encounter this problem and you are certain that no application
is using the volume, you can select the Ignore option in Auto-Snapshot
Manager or you can set the disk offline on Windows Server 2012 by
using the following procedure:
CAUTION: Following
this procedure (using either the ASM/ME GUI or the ASMCLI) when one
or more files are in use might result in data loss or corruption.
Identify the correct iSCSI target.
Launch the command prompt by clicking Start → Run, then type cmd.
Enter diskpart at the Windows command prompt to display the DISKPART> prompt.
Enter list volume to list
all volumes known to Windows.
Examine the column headed Volume ### and identify the volume (or volumes) associated with the iSCSI target.
Enter select volumevolume_name, where volume_name is the volume
that you identified in the previous step.
Enter offline disk to set the physical disk for the volume offline.
Enter exit to
close the diskpart menu.
Enter exit to close the command window.
After setting the disk offline,
you can successfully log out from the iSCSI target using the iSCSI
initiator GUI or CLI.
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