Virtual Volume Management
This product displays the information on Virtual Volumes created using a virtual machine on the VMware vCenter Server. A Virtual Volume is also an FTV. A Virtual Volume has "Block/VVOL" displayed under Usage column on the Web Console Volume List screen.
The Virtual Volume types are as follows. These types are displayed as VVOL Type column on the Web Console Volume List screen.
VVOL Type | Meaning |
|---|---|
Config | For VMware management information |
Data | For OS and business data |
Swap | For swap area |
Memory | For memory image at time of Snapshot |
Other | Other than the above |
Information
For other volumes than Virtual Volume, the VVOL Type is displayed as a hyphen (-).
If an error occurs while creating the virtual machine or operating the Snapshot, there are times when a mid-creation Virtual Volume remains. In this case, the VVOL Type is displayed as "Unknown".
Each Virtual Volume has configuration information which is called "VVOL Metadata". VVOL Metadata is stored in both the repository on this product and the ETERNUS Disk storage system. Even if the ETERNUS Disk storage system is deleted from this product, the VVOL Metadata information is not deleted from the repository for this product. If the ETERNUS Disk storage system is deleted from this product and will not be reused, execute the "esfadm esfdata delete" command to delete the VVOL Metadata information from this product.
If the repository of this product gets corrupted or restored from backup, first restore the Storage Cruiser's manager environment. After that, execute the "esfadm esfdata restore" command to reflect the latest information stored in the ETERNUS Disk storage system to the repository of this product.
If the information stored in the ETERNUS Disk storage system is damaged, execute the "esfadm esfdata backup" command to reflect the repository information for this product in the ETERNUS Disk storage system.
Note
Virtual Volumes cannot be created/deleted on this product. However, the exception is a Virtual Volume whose VVOL Type is "Unknown", which can be deleted. If deleting a number of Virtual Volumes, multiple volumes cannot be deleted at the same time, so delete them one by one.
Virtual Volume information cannot be displayed with the "storageadm" command.
In the ETERNUS Disk storage system, the VVOL metadata is stored on the FTV named "$VVOL_META". This FTV cannot be deleted from this product. To remove the Tier pool in which this FTV exists, take the following steps:
Execute FTV RAID Migration to other Tier pool on ETERNUS Web GUI.
For RAID Migration, select "Thick" for Allocation settings on the migration destination volume.
Delete the target Tier pool on Web Console.
For Allocation settings of FTV whose name is "$VVOL_META", "Thick" is fixed and no change is required. When Allocation settings were changed to "Thin" on Web Console, perform the Reload Conf. operation to make the information on Web Console up-to-date.
See
Refer to "Restoring Manager" in the Storage Cruiser Operation Guide for the restore method of the Storage Cruiser's manager environment.
Refer to "Command References" in the Storage Cruiser Operation Guide for information on the command.
