Abstract: The present disclosure provides an alane preparation method, a preparation system and an application thereof that includes: preparing triethylaluminum: taking triethylaluminum as seeds and aluminum and hydrogen as raw materials, synthesizing triethylaluminum via a direct synthesis method; the triethylaluminum that is newly synthesized contains triethylaluminum of an equal amount as the seeds and triethylaluminum configured to perform alane synthesis; preparing alane: performing thermal decomposition on triethylaluminum that is configured to perform alane synthesis, to obtain alane, wherein the newly synthesized triethylaluminum with an amount equivalent to that of the seeds are used as new seeds for the preparation of new triethylaluminum. The present disclosure only consumes aluminum and hydrogen that are necessary for preparing alane during the preparation process, other raw materials can achieve a balance between consumption and production during the production process.

Abstract: The system described herein provides the ability to efficiently back up and restore files within a service, such as a network-based file hosting service or a collaboration service. The system is configured to improve file restoration (may also be referred to as recovery) that occurs in response to an event (may also be referred to as an incident) that compromises a tenant device on which the files reside, thereby preventing access to the files or corrupting the files that are available to the tenant. An example of an event includes a ransomware attack. The described system utilizes a set of defined resources within a boundary to back up tenant files and restore the files. The resources include a metadata database and a blob store. The system combines mutable metadata with immutable content objects within the service to provide faster restoration than the conventional approach.