Constraints

Creating disks

Device type

The device type of a disk cannot be changed after the disk has been created.

Disk sharing

The sharing attribute of a disk cannot be changed after the disk has been created.

Disk encryption

The encryption attribute of a disk cannot be changed after the disk has been created.

Attaching disks

Number of servers that a non-shared disk can be attached to

1

Number of servers that a shared disk can be attached to

16

Expanding disk capacity

Capacity expansion

Disk capacities can be expanded only.

Capacity expansion of non-shared disks

Some server OSs support the capacity expansion of non-shared, In-use disks.

Capacity expansion of shared disks

A shared disk must be detached from all its servers before expansion. That is, the shared disk status must be Available.

Expansion increment

1 GB

Detaching disks

System disk detachment

A system disk can only be detached offline, that is, its server must be in the Stopped state.

Data disk detachment

A data disk can be detached online or offline, that is, its server can either be in the Running or Stopped state.

Deleting disks

-

• Only disks in the following statuses can be deleted: Available, Error, Expansion failed, or Restoration failed.
• Before you delete a shared disk, ensure that the disk has been detached from all its servers.

Disk capacity

Maximum capacity of a system disk

• High I/O: 1024 GB
• Ultra-high I/O: 1024 GB

Maximum capacity of a data disk

• High I/O: 32768 GB
• Ultra-high I/O: 32768 GB

Maximum capacity supported by the MBR partition style

2 TB

Maximum capacity supported by the GPT partition style

18 EB