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DriveInfo.IsReady Property

Gets a value that indicates whether a drive is ready.

Namespace:  System.IO
Assembly:  mscorlib (in mscorlib.dll)

Public ReadOnly Property IsReady As Boolean

Property Value

Type: System.Boolean
true if the drive is ready; false if the drive is not ready.

IsReady indicates whether a drive is ready. For example, it indicates whether a CD is in a CD drive or whether a removable storage device is ready for read/write operations. If you do not test whether a drive is ready, and it is not ready, querying the drive using DriveInfo will raise an IOException.

Do not rely on IsReady to avoid catching exceptions from other members such as TotalSize, TotalFreeSpace, and DriveFormat. Between the time that your code checks IsReady and then accesses one of the other properties (even if the access occurs immediately after the check), a drive may have been disconnected or a disk may have been removed.

The following code example demonstrates the use of the DriveInfo class to display information about all of the drives on the current system.

Imports System
Imports System.IO

Class Test
    Public Shared Sub Main()
        Dim allDrives() As DriveInfo = DriveInfo.GetDrives()

        Dim d As DriveInfo
        For Each d In allDrives
            Console.WriteLine("Drive {0}", d.Name)
            Console.WriteLine("  Drive type: {0}", d.DriveType)
            If d.IsReady = True Then
                Console.WriteLine("  Volume label: {0}", d.VolumeLabel)
                Console.WriteLine("  File system: {0}", d.DriveFormat)
                Console.WriteLine( _
                    "  Available space to current user:{0, 15} bytes", _

                Console.WriteLine( _
                    "  Total available space:          {0, 15} bytes", _

                Console.WriteLine( _
                    "  Total size of drive:            {0, 15} bytes ", _
            End If 
    End Sub 
End Class 
'This code produces output similar to the following: 

'Drive A:\ 
'  Drive type: Removable 
'Drive C:\ 
'  Drive type: Fixed 
'  Volume label:  
'  File system: FAT32 
'  Available space to current user:     4770430976 bytes 
'  Total available space:               4770430976 bytes 
'  Total size of drive:                10731683840 bytes  
'Drive D:\ 
'  Drive type: Fixed 
'  Volume label:  
'  File system: NTFS 
'  Available space to current user:    15114977280 bytes 
'  Total available space:              15114977280 bytes 
'  Total size of drive:                25958948864 bytes  
'Drive E:\ 
'  Drive type: CDRom 

'The actual output of this code will vary based on machine and the permissions 
'granted to the user executing it.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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