Check if any long operation is running (Backup/Restore/DBCC CHECKDB)

You can check the progress of your Backup/Restore/CheckDB with the following statement

SELECT r.session_id,r.command,r.blocking_session_id,
CONVERT(NUMERIC(6,2),r.percent_complete) AS [Percent Complete],CONVERT(VARCHAR(20),
DATEADD(ms,r.estimated_completion_time,GetDate()),20) AS [ETA Completion Time],
CONVERT(NUMERIC(10,2),r.total_elapsed_time/1000.0/60.0) AS [Elapsed Min],
CONVERT(NUMERIC(10,2),r.estimated_completion_time/1000.0/60.0) AS [ETA Min],
CONVERT(NUMERIC(10,2),r.estimated_completion_time/1000.0/60.0/60.0) AS [ETA Hours],
CONVERT(VARCHAR(1000),(SELECT SUBSTRING(text,r.statement_start_offset/2,
CASE WHEN r.statement_end_offset = -1 THEN 1000 ELSE (r.statement_end_offset-r.statement_start_offset)/2 END)
FROM sys.dm_exec_sql_text(sql_handle)))
FROM sys.dm_exec_requests r 
WHERE command LIKE ('BACKUP%')OR command LIKE ('RESTORE%')OR command LIKE ('DBCC%')