-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 O90oBJ0W2+7p49q7BqEGK+vFGBoeDD+1yvOT/G9AXtfM0ANoOKs5f0kzi/xlLrpp
 gf2GwLfADIUJeTKFRVcZqg==

<SEC-DOCUMENT>0001249817-03-000027.txt : 20031021
<SEC-HEADER>0001249817-03-000027.hdr.sgml : 20031021
<ACCEPTANCE-DATETIME>20031021153007
ACCESSION NUMBER:		0001249817-03-000027
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031020
FILED AS OF DATE:		20031021

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TOVEY DAVID
		CENTRAL INDEX KEY:			0001249055

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-23298
		FILM NUMBER:		03949787

	BUSINESS ADDRESS:	
		STREET 1:		26650 ALISO VIEJO PARKWAY
		CITY:			ALISO VIEJO
		STATE:			CA
		ZIP:			92656
		BUSINESS PHONE:		9493896120

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			QLOGIC CORP
		CENTRAL INDEX KEY:			0000918386
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				330537669
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0328

	BUSINESS ADDRESS:	
		STREET 1:		26650 LAGUNA HILLS DR
		CITY:			ALLISO VIEJO
		STATE:			CA
		ZIP:			92656
		BUSINESS PHONE:		7144382200

	MAIL ADDRESS:	
		STREET 1:		26650 LAGUNA HILLS DR
		CITY:			ALLISO VIEJO
		STATE:			CA
		ZIP:			92656

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Q LOGIC CORP
		DATE OF NAME CHANGE:	19940201
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-10-20</periodOfReport>
    <issuer>
        <issuerCik>0000918386</issuerCik>
        <issuerName>QLOGIC CORP</issuerName>
        <issuerTradingSymbol>qlgc</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001249055</rptOwnerCik>
            <rptOwnerName>TOVEY DAVID</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>26650 ALISO VIEJO PARKWAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ALISO VIEJO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92656</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>V.P. AND GM PERIPHERAL PROD.</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-10-20</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>7200</value></transactionShares><transactionPricePerShare><value>53.267</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>98297</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natu
reOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes/><remarks/><ownerSignature><signatureName>David Tovey</signatureName><signatureDate>2003-10-20</signatureDate></ownerSignature></ownershipDocument>

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