What is the problem that the health u+ database cannot be restored after cleaning?

The database has been deleted. From the analysis of log content, the database on the machine crashed, resulting in file damage, which could not be recovered normally after restart and could not provide services to the outside world normally. After cleaning, the normal u+ database cannot be restored because it has been deleted. A database refers to an organized and pleasant collection of data stored in a computer for a long time. The data in the database is organized, described and stored according to a certain data model, with less redundancy.