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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Pw7xE+yE/khrKVwRfkxzO0kMILT+xKzzZaL7J3apaliSq9sbR6UizmgVsHJY8l6D
 Fnr0ngzSx4Rc+OkKsDrbJg==

<SEC-DOCUMENT>0001179110-03-006372.txt : 20030826
<SEC-HEADER>0001179110-03-006372.hdr.sgml : 20030826
<ACCEPTANCE-DATETIME>20030826122820
ACCESSION NUMBER:		0001179110-03-006372
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030801
FILED AS OF DATE:		20030826

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ANDREOLI ALAIN F
		CENTRAL INDEX KEY:			0001256167

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-31257
		FILM NUMBER:		03865965

	MAIL ADDRESS:	
		STREET 1:		380 INTERLOCKEN CRESCENT
		CITY:			BROOMFILED
		STATE:			CO
		ZIP:			80021

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MCDATA CORP
		CENTRAL INDEX KEY:			0000731502
		STANDARD INDUSTRIAL CLASSIFICATION:	COMMUNICATIONS EQUIPMENT, NEC [3669]
		IRS NUMBER:				841421844
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0131

	BUSINESS ADDRESS:	
		STREET 1:		380 INTERLOCKEN CRESCENT
		CITY:			BROOMFIELD
		STATE:			CO
		ZIP:			80021
		BUSINESS PHONE:		3034609200

	MAIL ADDRESS:	
		STREET 1:		380 INTERLOCKEN CRESCENT
		CITY:			BROOMFIELD
		STATE:			CO
		ZIP:			80021
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>
<periodOfReport>2003-08-01</periodOfReport>
<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000731502</issuerCik>
        <issuerName>MCDATA CORP</issuerName>
        <issuerTradingSymbol>MCDT</issuerTradingSymbol>
</issuer>
<reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001256167</rptOwnerCik>
            <rptOwnerName>ANDREOLI ALAIN F</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>380 INTERLOCKEN CRESCENT</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BROOMFIELD</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80021</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector>
<isOfficer>1</isOfficer>
<isTenPercentOwner>0</isTenPercentOwner>
<isOther>0</isOther>
<officerTitle>Executive VP/Sales &amp; Service</officerTitle>
<otherText></otherText>
</reportingOwnerRelationship>
</reportingOwner>
<nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>McDATA Class B Restricted Stock</value>
</securityTitle>
<transactionDate><value>2003-08-01</value>
</transactionDate>
<transactionCoding><transactionFormType>4</transactionFormType>
<transactionCode>A</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionAmounts><transactionShares><value>7775</value>
<footnoteId id="F1"></footnoteId>
<footnoteId id="F2"></footnoteId>
</transactionShares>
<transactionPricePerShare><value>0.00</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode><value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>23325</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
</nonDerivativeTable>
<derivativeTable></derivativeTable>
<footnotes><footnote id="F1">The shares of restricted stock are subject to forfeiture.</footnote>
<footnote id="F2">Class B Restricted Stock Bonus grant under McDATA's 2001 Equity Incentive Plan subject to a 48 month cliff vest that may be accelerated to 18 months upon attainment of quarterly objectives.</footnote>
</footnotes>
<ownerSignature><signatureName>Alain Andreoli</signatureName>
<signatureDate>2003-08-01</signatureDate>
</ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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