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Create and Manage Volumes


This manual provide a quick help on how to create, delete, attach and detach your volume using Volumes Dashboard.

Create a new volume

In GWDG horizon dashboard, you can create a volume (block storage) by following these steps:

1- From the left menu bar, select project→Volumes→Volumes and then click “Create Volume”.

2- Fill the displayed form with the following information:

Please do not use any character rather than standard alphanumeric!

  • Volume Name: Specify a name for the volume.
  • Description: Optionally, provide a brief description for the volume.
  • Volume Source: Select “No source, empty volume” unless you want to create the volume as a copy of an existing volume or image.
  • Type: Select “ssd” for a faster SSD-based storage or “standard” for a normal HDD-based storage.
  • Size (GiB): The size of the volume in gibibytes.
  • Availability Zone: Leave it with default value “nova”.

3- Click “Create Volume” and wait until the status of the volume is “Available”.

Manage an existing volume

There are several actions which can be applied on a volume. You can see the list of them by clicking the small arrow on the very right of each volume row. The most useful ones are described as follow.

The volume which is not attached and has no related snapshot can be deleted by Delete Volume .

The size of the volume which is not attached can be increased by Extend Volume .

The volume which is not attached can be transferred to another project by Create Transfer . The necessary quota in destination project should be met. The provided “Transfer ID” and “Authorization Key” should be given to receiver, to be used for accepting the transfer.

To attach or detach a Volume to or from an instance, the Manage Attachments option should be used.

To attach a volume to a running instance, the following steps should be fulfilled:

  • Select “Manage Attachment” of a volume with “Available” status.
  • On displayed form, select the intended instance from the “Attach to Instance” list.
  • You can optionally change the device name.
  • Connect to your instance and run “fdisk -l” to verify if the volume is attached.
  • If the volume is new (has not been attached to another instance before) you will see a message in the output of previous image indicating that the disk doesn't contain a valid partition table.
  • To format your device, execute: “fdisk /dev/vdc” (/dev/vdc should be replaced by your device name if it is different)

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