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Testing If a Drive or Directory Exists from a Batch File This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.View products that this article applies to.function loadTOCNode(){}Article ID:65994Last Review:November 16, 2006Revision:2.1This article was previously published under Q65994SUMMARYloadTOCNode(1, 'summary');
You can use the IF EXIST statement to check for the presence of a
directory. For example, to test for C:\WIN and then change to C:\WIN if it
exists, use the following batch file:
C:
IF NOT EXIST C:\WIN\NUL GOTO NOWINDIR
CD \WIN
:NOWINDIR
MORE INFORMATIONloadTOCNode(1, 'moreinformation');
NUL always exists on a local MS-DOS FAT drive; therefore, if C:\WIN exists,
C:\WIN\NUL exists. This technique can also be used to verify that a drive
exists. For example:
IF EXIST E:\NUL GOTO USE_E
If an unformatted disk is tested, or if the floppy disk drive is empty, an
INT 24 error (Abort, Retry, Fail?) occurs.
Neither of these tests works correctly with network devices or any other
device that does not have a block device-driver-controlled FAT file system
(for example, when you are using Windows for Workgroups 3.11 with 32-Bit
File Access enabled).
Prior to using this technique, you should know what network software the
client is using, what type of server they're connecting to, and the file
system the server is using.
The following table shows when IF EXIST returns NUL:
With 32-Bit File
No 32-Bit With 32-Bit Access and NetWare
Drive Type File Access File Access 3.x connectivity
Local FAT correctly always never
Windows for Workgroups FAT correctly always never
Microsoft LAN Manager HPFS never always never
Windows NT FAT/NTFS never always never
NetWare correctly never never
APPLIES TO•Microsoft MS-DOS 3.1•Microsoft MS-DOS 3.2 Standard Edition•Microsoft MS-DOS 3.21 Standard Edition•Microsoft MS-DOS 3.3 Standard Edition•Microsoft MS-DOS 3.3a•Microsoft MS-DOS 4.0 Standard Edition•Microsoft MS-DOS 4.01 Standard Edition•Microsoft MS-DOS 5.0 Standard Edition•Microsoft MS-DOS 5.0a•Microsoft MS-DOS 6.0 Standard Edition•Microsoft MS-DOS 6.2 Standard Edition•Microsoft MS-DOS 6.21 Standard Edition•Microsoft MS-DOS 6.22 Standard Edition•Microsoft Windows for Workgroups 3.11 Back to the topKeywords: KB65994Article TranslationsArabicFrenchGermanItalianJapanesePortuguese (Brazil)Portuguese (Portugal)Simplified ChineseSpanishTraditional Chinese Other Support OptionsNeed More Help?Contact a Support professional by E-mail, Online or Phone.Customer ServiceFor non-technical assistance with product purchases, subscriptions, online services, events, training courses, corporate sales, piracy issues, and more.NewsgroupsPose a question to other users. Discussion groups and Forums about specific Microsoft products, technologies, and services.Page ToolsPrint this pageE-mail this page
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