SQL: Differential backup

Risk :

Missing differential backup may cause loss of data. In case of database fault , we won’t be able to restore the database.


A Differential backup contains all the data in a specific database or set of file groups or files since last Full backup.

A Differential backup cannot be executed without Full backup but it is smaller and faster to create than the base of a full backup and it also requires less disk space to store backup images


Differential SQL backup should execute successfully every 24 hours.

What went wrong?

  • Large backup file cause long backup execute.
  • No available disk space.
  • Network is not available.

What to do:

  • Check backup system.
  • Check server network connection