MS SQL Server Tutorial: Finding free space,free space percentage,total drive size for a server

use master
go

CREATE PROCEDURE sp_diskspace
AS
/*
    Displays the free space,free space percentage
    plus total drive size for a server
*/
SET NOCOUNT ON

DECLARE @hr int
DECLARE @fso int
DECLARE @drive char(1)
DECLARE @odrive int
DECLARE @TotalSize varchar(20)
DECLARE @MB bigint ; SET @MB = 1048576

CREATE TABLE #drives (drive char(1) PRIMARY KEY,
                                 FreeSpace int NULL,
                                 TotalSize int NULL)

INSERT #drives(drive,FreeSpace)
EXEC master.dbo.xp_fixeddrives

EXEC @hr=sp_OACreate 'Scripting.FileSystemObject',@fso OUT
IF @hr <> 0 EXEC sp_OAGetErrorInfo @fso

DECLARE dcur CURSOR LOCAL FAST_FORWARD
FOR SELECT drive from #drives
ORDER by drive

OPEN dcur

FETCH NEXT FROM dcur INTO @drive

WHILE @@FETCH_STATUS=0
BEGIN

            EXEC @hr = sp_OAMethod @fso,'GetDrive', @odrive OUT, @drive
            IF @hr <> 0 EXEC sp_OAGetErrorInfo @fso
            
            EXEC @hr = sp_OAGetProperty @odrive,'TotalSize', @TotalSize OUT
            IF @hr <> 0 EXEC sp_OAGetErrorInfo @odrive
                                    
            UPDATE #drives
            SET TotalSize=@TotalSize/@MB
            WHERE drive=@drive
            
            FETCH NEXT FROM dcur INTO @drive

END

CLOSE dcur
DEALLOCATE dcur

EXEC @hr=sp_OADestroy @fso
IF @hr <> 0 EXEC sp_OAGetErrorInfo @fso

SELECT drive,
          FreeSpace as 'Free(MB)',
          TotalSize as 'Total(MB)',
          CAST((FreeSpace/(TotalSize*1.0))*100.0 as int) as 'Free(%)'
FROM #drives
ORDER BY drive

DROP TABLE #drives

RETURN
go