Article ID: 837326 - View products that this article applies to.
To obtain accurate results from the Check Disk tool (Chkdsk.exe), you must run the tool against a volume that is offline. You cannot always do this in a production environment. Instead, you can use the Verify Disk tool (Vrfydsk.exe) to check a volume for errors without taking the volume offline.
Vrfydsk.exe is a command-line tool that checks the consistency and the integrity of the FAT file system or of the NTFS file system on a specified volume. Vrfydsk.exe creates and displays a status report for the volume. This status report also lists any errors that are on the volume.
Note Vrfydsk.exe cannot correct any errors that it discovers. To correct these errors, run Chkdsk.exe in fix mode (chkdsk /f).
To download and to install Vrfydsk.exe, visit the following Microsoft Web site:
http://www.microsoft.com/downloads/details.aspx?familyid=9d467a69-57ff-4ae7-96ee-b18c4790cffd&displaylang=enNote Windows Server 2003 Service Pack 1 (SP1) contains new fuctionality that lets the Chkdsk.exe tool run in "read-only" mode to create and to use a snapshot to check the volume. This resembles what the Vrfydsk.exe tool does. If you have Windows Server 2003 SP1 installed on a system, we recommend that you use the Chkdsk.exe tool in read-only mode instead of using the Vfrydsk.exe tool. Read-only mode does not use switches.
How to use the Vrfydsk.exe toolTo test drive C for corruption, follow these steps:
SyntaxVrfydsk.exe uses the following syntax:
Vrfydsk [volume[Path]] [/V] [/I] [/C] [/?]
OptionsVrfydsk.exe uses the following options:
Note The Vrfydsk.exe options are a subset of the Chkdsk.exe options. All the options for Vrfydsk.exe are passed directly to Chkdsk.exe as options for the corresponding switch.
Differences between Chkdsk.exe and Vrfydsk.exeChkdsk.exe provides functionality that is similar to the Vrfydsk.exe functionality. However, if you run Chkdsk.exe on an active computer, on a startup volume, or on a data volume that another program or another process is using, Chkdsk.exe might report nonexistent errors. Vrfydsk.exe does not have this limitation.
If you run Chkdsk.exe on a volume that is being used, Chkdsk.exe might report nonexistent errors because the volume changes while Chkdsk.exe runs. To make sure that Chkdsk.exe receives a consistent view of the volume, you may have to take the volume offline. This can be an issue if you maintain a service level agreement that has the following specifications:
Vrfydsk.exe does not create a complete copy of the data. Vrfydsk.exe only creates a shadow copy of the data. Therefore, it does not take much longer to run Vrfydsk.exe than to run Chkdsk.exe.
Article ID: 837326 - Last Review: December 6, 2006 - Revision: 3.1