High-Risk Operations

To avoid adverse impacts on ModelArts Lite Server, you must perform high-risk operations according to operation guides during the routine O&M.

Risky operations fall into three levels:

High: Such operations may cause service failures, data loss, system maintenance failures, and system resource exhaustion.
Medium: Such operations may cause security risks and reduce service reliability.
Low: Such operations include high-risk operations other than those of a high or medium risk level.

**Table 1** High-risk operations
Object	Operation	Risk	Severity	Solution
OS	Upgrade or modify the OS kernel or driver.	The driver and kernel versions may not be compatible. As a result, the OS cannot be started or basic functions are unavailable. For example, apt-get upgrade is high-risk command.	High	Contact Huawei technical support.
OS	Switch or reset OS.	The EVS system ID is changed. As a result, the EVS system disk cannot be scaled out, and message "The order is expired. The capacity cannot be expanded. Renew the order." is displayed.	Medium	Mount an EVS or SFS disk for capacity expansion.