To see whether you are affected by this issue at all, you can use the Oracle VM Manager Web Interface to view the Physical Disks perspective for each Oracle VM Server in your environment. If a disk has been affected by the upgrade, it is displayed with a WARNING status. The event message shows "Physical disk is Offline".

In an environment with many Oracle VM Servers, it may not be practical to use the Oracle VM Manager Web Interface to check the status of the physical disks for every server. You can, however, use the Oracle VM Manager Command Line Interface in combination with the grep utility to quickly view all of the events that contain this event message. An example, where the command is run on the Oracle VM Manager host, follows:

$ ssh -l admin localhost -p 10000 "getEvents severity=WARNING" | grep -i "physical \
  disk is offline"
  
id:3190     createTime:May 09, 2014 2:02:00 pm     modTime:May 09, 2014 2:02:00 pm     
type:storage.device.offline.     severity:Warning     summary:Physical disk is 
Offline     acked:No description:OVMEVT_007005D_001 Rescan storage layer on 
server [ovs237] did not return physical disk [3600605b0057feba01a0e216512d1b7aa] 
for storage array [Generic Local Storage Array @ ovs237]. 
assocObjectId:0004fb0000180000833252939ba41cf9

Note that for these events, you must check that the event occurs for a Generic Local Storage Array. The server that is affected is displayed in the output, as is the id for the missing disk.

If this event message exists for any of the local physical disks attached to any of your Oracle VM Servers, then you are most likely affected by this issue and should continue with the rest of the steps described here.

By default, the simple names that Oracle VM Manager assigns to physical disks are based on the disk Page83 ID. If you have not renamed your physical disks, identifying newly discovered disks that map onto missing disks is simple, since the disk names can be compared to find matches. This is illustrated in the following output from the Oracle VM Manager Command Line Interface:

OVM> list physicalDisk
Command: list physicalDisk
Status: Success
Time: 2014-05-06 13:40:49,503 PDT
Data:
 id:0004fb00001800007b2cdfbecb973c4d  
 name:SATA_VBOX_HARDDISK_VBcdfe5359-5146ac3d_
 id:0004fb0000180000f9c966f19c14cc95  
 name:SATA_VBOX_HARDDISK_VBcdfe5359-5146ac3d

In this output, the first physical disk listed is the original disk item, while the second disk is the newly discovered version of the same disk. The first physical disk is marked as missing in Oracle VM Manager. Since the second disk has the same name, with the exclusion of the final underscore character, it is easy to identify that these entries actually point to the same disk.

If you have changed the names for your physical disks, this process is fractionally more complicated since you must compare the Page83 ID of each disk to find the match. Obtaining the Page83 ID of a disk using the Oracle VM Manager Command Line Interface is illustrated below:

OVM> show physicaldisk id=0004fb00001800009eed86fbc36b41bc
Command: show physicaldisk id=0004fb00001800009eed86fbc36b41bc
Status: Success
Time: 2014-05-13 13:45:56,732 CEST
Data: 
  Page83 ID = 350014ee20137ee44
  Server Reserved = No
  Shareable = No
  Size (GiB) = 465.76
  State = UNKNOWN
  Thin Provision = No
  Type = LUN
  Vendor = ATA
  File System 1 = 0004fb00000500000809e28f4fab56b1  [fs on 350014ee20137ee44]
  Volume Group = 0004fb00003200004dddc710a12aa1b7  [Local Storage Volume Group]
  Id = 0004fb00001800009eed86fbc36b41bc  [Server5 ATA Disk]
  Name = Server5 ATA Disk
  Description = WDC WD5001ABYS-0
  Locked = false

Note that the Page83 ID is shown as a property of the disk. You must obtain the Page83 ID for each missing disk and then find any physical disks that have their name or Page83 ID set to the same value. These disks are the newly discovered versions of the same physical disk.

The names of any child objects of the missing disk, such as file system names, repository names and the names of any items within the repository are all associated with the missing disk. This information is lost when you delete the missing disk from your environment. If you have named any of these objects within Oracle VM Manager, you should take note of the names of these objects before continuing. Although this is not a necessary step, since the names are only helpful within Oracle VM Manager and do not affect the running of your environment, to return your environment to the same state after you delete any missing disks you may wish to rename these objects once they are associated with the newly discovered version of the same physical disk.

Using the Oracle VM Manager Command Line Interface you can run the following commands to obtain a dump of the names of all of these objects:

OVM> list physicaldisk
OVM> list filesystem
OVM> list repository
OVM> show repository id=0004fb0000030000e0f09683cd2ac72a

Substitute 0004fb0000030000e0f09683cd2ac72a with the id for each repository in your environment, and run the same command for each repository.

The goal of this exercise is to obtain a listing of the names of any of the objects that may be affected when you remove the physical disk that they are associated with. Store the information returned by these commands in a place that you can refer to when you need to rename objects.

If you have made a record of the object names of all affected objects, it is safe to delete the missing disks, as illustrated in the following output from the Oracle VM Manager Command Line Interface:

OVM> delete physicalDisk id=0004fb00001800007b2cdfbecb973c4d
Command: delete physicalDisk id=0004fb00001800007b2cdfbecb973c4d
Status: Success
Time: 2014-05-06 13:43:55,253 PDT
JobId: 1399409030129

These actions can also be performed in the Oracle VM Manager Web Interface, if preferred.

Once you have deleted the missing disk entry, you must perform the following actions:

At this point, your environment is usable, although the names of various objects have been lost. For instance, any file system names, repository names, or the names of objects such as virtual machines in a repository are likely to have been reset to default values. If you kept a record of the object names affected, as recommended in the previous step, then you can manually rename objects as required.

If you have any virtual machines that were configured to use a local physical disk that is marked as missing, you must remove the original disk mapping and then reconfigure the virtual machine to attach a new physical disk. When you select the new physical disk, you should select the physical disk with the same Page83 ID as the missing disk. To reconfigure these disk mappings, you must edit the virtual machine as described in Edit Virtual Machine in the Oracle VM Manager User's Guide.