-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 VyQ+gKjgDXWwbNM5ZzQrs++FnCLIDUVJ/VMLtmae+zu3wsAeE3O2H6gHO5BlH9WX
 z1K9krpHWplAQIEAPR2sjA==

<SEC-DOCUMENT>0000770403-05-000017.txt : 20051227
<SEC-HEADER>0000770403-05-000017.hdr.sgml : 20051226
<ACCEPTANCE-DATETIME>20051227193923
ACCESSION NUMBER:		0000770403-05-000017
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20051222
FILED AS OF DATE:		20051227
DATE AS OF CHANGE:		20051227

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BRITTS WILLIAM C
		CENTRAL INDEX KEY:			0001198540

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21103
		FILM NUMBER:		051287758

	BUSINESS ADDRESS:	
		STREET 1:		P.O. BOX 97057
		CITY:			REDMOND
		STATE:			WA
		ZIP:			98073
		BUSINESS PHONE:		4258953445

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ADVANCED DIGITAL INFORMATION CORP
		CENTRAL INDEX KEY:			0000770403
		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER STORAGE DEVICES [3572]
		IRS NUMBER:				911618616
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			1031

	BUSINESS ADDRESS:	
		STREET 1:		P O BOX 97057
		STREET 2:		11431 WILLOWS RD
		CITY:			REDMOND
		STATE:			WA
		ZIP:			98073-9757
		BUSINESS PHONE:		4258953232

	MAIL ADDRESS:	
		STREET 1:		P.O. BOX 97057
		STREET 2:		P O BOX 97057
		CITY:			REDMOND
		STATE:			WA
		ZIP:			98073-9757
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-12-22</periodOfReport>

    <issuer>
        <issuerCik>0000770403</issuerCik>
        <issuerName>ADVANCED DIGITAL INFORMATION CORP</issuerName>
        <issuerTradingSymbol>ADIC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001198540</rptOwnerCik>
            <rptOwnerName>BRITTS WILLIAM C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P.O. BOX 97057</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>REDMOND</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98073-9757</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP, Sales &amp; Marketing</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-12-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2422</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.12</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>84232</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-12-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>18000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.0444</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>66232</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Includes 2,664 shares acquired under the employee stock purchase plan.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Yukio Morikubo  Power of Attorney for William C. Britts</signatureName>
        <signatureDate>2005-12-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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