# [Reference] Disk type

### Enumeration value description

| Enumeration value | Disk type | Optional range (system disk) | Optional range (data disk) | Data Ark support |
|---|---|---|---|---|
| LOCAL\_NORMAL| Ordinary local disk | When creating/reinstalling: only supports the current image size<br> When reconfiguring [1]: current image size -100G | 20G - 2000G, default 20G | Supported, system disk and data The disk must be turned on at the same time |
| LOCAL\_SSD| SSD local disk | When creating/reinstalling: only the current image size is supported <br> When reconfiguring [1]: Current image size - 100G | 20G - 1000G, default 20G | Not supported |
| CLOUD\_NORMAL| Ordinary cloud disk | (not supported) | 20G - 8000G, default 20G | Only supports data disk |
| CLOUD\_SSD| SSD cloud disk | 20-500G <br> Support creation/reinstallation/modification [2] | 20G - 8000G, default 20G | Not supported |
| CLOUD_ESSD | SSD Essential cloud disk | (not supported) | 20G - 8000G, default 20G | Not supported |
| CLOUD\_RSSD| RSSD cloud disk | 20-500G <br> Support creation/reinstallation/modification [2] | 20G - 32000G, default 20G | Not supported |
| EXCLUSIVE\_LOCAL\_DISK| Exclusive local disk | 4096G / 3072G | Not supported | Not supported |

[1] The local disk does not support passing the system disk Size > image size when creating/reinstalling the host. But after the expansion is completed, there is no need to enter the system operation.

[2] Cloud disk supports passing system disk Size > image size when creating/reinstalling a host. After the expansion is completed, you need to enter the system to expand the file system. For the operation steps, please refer to [Document](https://docs.ucloud.cn/uhost/guide/disk#Cloud Disk).


### Relationship between model and disk (V2.0 concept-MachineType)


| MachineType enumeration value | Machine model | Optional disk (system disk + data disk) |
|---|---|---|
| N | Universal type N | Ordinary local disk + Ordinary local disk <br> SSD cloud disk + Ordinary cloud disk <br> SSD cloud disk + SSD cloud disk <br> SSD cloud disk + SSD Essential cloud disk <br> SSD local disk + SSD local disk |
| C | High frequency type C | SSD local disk + SSD local disk <br> SSD cloud disk + SSD cloud disk <br> SSD cloud disk + SSD Essential cloud disk |
| G | GPU type G | SSD local disk + SSD local disk <br> SSD cloud disk + SSD cloud disk |
| O | Outstanding type O | RSSD cloud disk + RSSD cloud disk <br> RSSD cloud disk + ordinary cloud disk <br> RSSD cloud disk + SSD cloud disk <br> RSSD cloud disk + SSD Essential cloud disk |
| OPRO | Outstanding PRO type OPRO | RSSD cloud disk + RSSD cloud disk <br> RSSD cloud disk + ordinary cloud disk <br> RSSD cloud disk + SSD cloud disk <br> RSSD cloud disk + SSD Essential cloud disk |


### Relationship between model and disk (V1.0 concept-UHostType)

| MachineType enumeration value | Machine model | Optional disk (system disk + data disk) |
|---|---|--|
| N3 | Standard N3 | Ordinary local disk + Ordinary local disk <br> SSD cloud disk + Ordinary cloud disk <br> SSD cloud disk + SSD cloud disk |
| C1 | High frequency type C1 | SSD local disk + SSD local disk <br> SSD cloud disk + SSD cloud disk |
| N2 | Standard N2 | Ordinary local disk + Ordinary local disk <br> SSD cloud disk + Ordinary cloud disk <br> SSD cloud disk + SSD cloud disk |
| I2 | High IO type I2 | SSD local disk + SSD local disk <br>SSD cloud disk + SSD cloud disk |
| G2 | GPU type - P40 | SSD local disk + SSD local disk<br> SSD cloud disk + SSD cloud disk |
| G3 | GPU type - V100 | SSD local disk + SSD local disk<br> SSD cloud disk + SSD cloud disk |
| N1 | Standard N1 | Ordinary local disk + Ordinary local disk |
| I1 | High IO type I1 | SSD local disk + SSD local disk |
| D1 | Big data type D1 | Ordinary local disk + exclusive local disk |
| G1 | GPU type - K80 | SSD local disk + SSD local disk |