Draw a system flowchart illustrating the steps performed by an operating system as it executes the instruction to back up a disk on a single-user computer system.

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The flowchart's pseudo code is as follows:

  • The command BACKUP user issues through the user interface.
  • UI executes the awakening File Manager instruction.
  • File Manager resolves the address of a backup file that wakes up Device Manager.
  • Device Manager opens the drive access path to back files in the Memory Manager I/O buffer that reads the file (or part of the data).
  • In the I/O buffer, Memory Manager assigns memory to the processor manager.
  • Processor Manager loads the I/O buffer memory file, and File Manager awakens.
  • File Manager determines the document address be copied into the Processor Managers new disc.
  • The Device Managers, Processor Manager copies memory to the I/O buffer.
  • This device manager enables you to open a drive access path where a new disc awakens file manager will be duplicated by the I/O buffer.
  • File Manager decides whether the file is copied completely If yes if you are jumping to point 11, you decide the next area of the file that will be backed up and Device Manager is returning to point 4.
  • File Manager decides if this is the last backup item, if not, it wakes up Manager of Processor Activates Processor Manager for sending interface File N is backed up for a client can jump back to point 3 if affirmative.
  • The Processor Manager activates the user interface to send the user message 'All files have been backed up'.

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