<?xml version="1.0"?><ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>3</documentType><periodOfReport>2004-01-05</periodOfReport>
    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001137789</issuerCik>
        <issuerName>SEAGATE TECHNOLOGY</issuerName>
        <issuerTradingSymbol>STX</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001275868</rptOwnerCik>
            <rptOwnerName>ROGGE KAREN M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>SEAGATE TECHNOLOGY</rptOwnerStreet1>
            <rptOwnerStreet2>920 DISC DRIVE</rptOwnerStreet2>
            <rptOwnerCity>SCOTTS VALLEY</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95066</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>VP Corporate Finance</officerTitle></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeHolding><securityTitle><value>NQ Stock Option</value></securityTitle><conversionOrExercisePrice><value>19.735</value></conversionOrExercisePrice><exerciseDate><value>2005-01-05</value></exerciseDate><expirationDate><value>2014-01-05</value><footnoteId id="F1"/></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Shares</value></underlyingSecurityTitle><underlyingSecurityShares><value>100000</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding></derivativeTable><footnotes><footnote id="F1">Options granted to the Reporting Person under the Issuer's 2001 Share Option Plan are subject to a five-year vesting schedule. 20% of the option shares vested on January 5, 2005. The remaining option shares are vesting and will continue to vest proportionally each month over the 48 months following January 5, 2005.</footnote></footnotes><ownerSignature><signatureName>/s/ Roberta S. Cohen for Karen M. Rogge</signatureName><signatureDate>2004-01-09</signatureDate></ownerSignature></ownershipDocument>



