Adding a disk to a virtual server will require that VS should be rebooted. If a VS is running when you try to add a new disk to it, you'll be asked to confirm the reboot. To add a disk to a virtual server:
- Go to your Control Panel's Virtual Servers menu.
- Click a VS's label to open its details screen.
- Click the Storage tab > Disks.
- Click the "+" button or the Create Disk button.
- Fill in the details:
- Specify disk label.
- Choose the data store to create a disk on from the drop-down list.
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Move the slider to the right to specify the desired disk size.

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Move the Hot Attach slider to the right if you want to enable disk hot attaching. In this case virtual server will not be stopped when adding a disk. Hot attach option is only available for KVM 6/ CentOS 6 virtual servers.
- Move the Swap Space slider to the right if this disk is swap space.
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Move the Require Format Disk slider to the right if this disk requires formatting.
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Move the Add to Linux FSTAB slider to the right if the disk should be added to Linux FSTAB (for Linux virtual servers).
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Specify its mount point. The maximum length of a Mount Point is 256 characters. Spaces are not allowed. No more than one slash is allowed. If the mount point is not specified the default mount point will be used:
/mnt/onapp-disk-#{disk.identifier}
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- Tick the Add to FreeBSD FSTAB checkbox if the disk should be added to FreeBSD FSTAB (for FreeBSD virtual servers).
- Indicate the file system - ext3 or ext4 - for Linux based VS.
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Click the Add Disk button to finish.