Removing host-to-virtual disk mapping
To remove the host to virtual disk mapping:
1
In the AMW, select the
Host Mappings
tab.
2
Select a virtual disk under
Defined Mappings
.
3
Perform one of these actions:
•
From the menu bar, select
Host Mappings
>
LUN Mapping
>
Remove.
•
Right-click the virtual disk, and select
Remove
from the pop-up menu.
4
Click
Yes
to remove the mapping.
Changing the RAID controller module ownership of a disk
group
You can change the RAID controller module ownership of a disk group. You can also change the RAID controller module ownership of a
standard virtual disk or a snapshot repository virtual disk. You cannot directly change the RAID controller module ownership of a snapshot
virtual disk because the snapshot virtual disk inherits the RAID controller module owner of its associated source virtual disk. Changing the
RAID controller module ownership of a virtual disk changes the preferred RAID controller module ownership of the virtual disk.
During a virtual disk copy, the same RAID controller module must own both the source virtual disk and the target virtual disk. Sometimes
both virtual disks do not have the same preferred RAID controller module when the virtual disk copy starts. Therefore, the ownership of the
target virtual disk is automatically transferred to the preferred RAID controller module of the source virtual disk. When the virtual disk copy
is completed or is stopped, ownership of the target virtual disk is restored to its preferred RAID controller module. If ownership of the
source virtual disk is changed during the virtual disk copy, ownership of the target virtual disk is also changed. Under certain operating
system environments, it may be necessary to reconfigure the multi-path driver before an I/O path can be used.
To change the RAID controller module ownership of a disk group:
1
In the AMW, select the
Storage & Copy Services
tab and select a disk group.
2
From the menu bar, select
Storage
>
Disk Group
>
Change
>
Ownership/Preferred Path.
3
Select the appropriate RAID controller module slot and click
Yes
to confirm the selection.
CAUTION:
Possible loss of data access—Changing ownership at the disk group level causes every virtual disk in that disk
group to transfer to the other RAID controller module and use the new I/O path. If you do not want to set every virtual disk
to the new path, change ownership at the virtual disk level instead.
The ownership of the disk group is changed. I/O to the disk group is now directed through this I/O path.
NOTE:
The disk group may not use the new I/O path until the multi-path driver reconfigures and recognizes the new path.
This action usually takes less than 5 minutes.
Changing the RAID level of a disk group
Changing the RAID level of a disk group changes the RAID levels of every virtual disk that comprises the disk group. Performance may be
slightly affected during the operation.
Guidelines to change the RAID level of a disk group:
•
You cannot cancel this operation after it begins.
•
The disk group must be in
Optimal
status before you can perform this operation.
•
Your data is available during this operation.
•
If you do not have enough capacity in the disk group to convert to the new RAID level, an error message is displayed, and the operation
does not continue. If you have unassigned physical disks, use the
Storage
>
Disk Group
>
Add Physical Disks (Capacity)
option to add
additional capacity to the disk group and then retry the operation.
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Disk groups, standard virtual disks, and thin virtual disks
