SCHEDULE 13G Amendment No. 0 Quantum Corporation Hard Disk Drive group common stock Cusip # 747906303 Cusip # 747906303 Item 1: Reporting Person - FMR Corp. Item 4: Commonwealth of Massachusetts Item 5: 398,936 Item 6: 0 Item 7: 9,711,672 Item 8: 0 Item 9: 9,711,672 Item 11: 12.218% Item 12: HC Cusip # 747906303 Item 1: Reporting Person - Edward C. Johnson 3d Item 4: United States of America Item 5: 0 Item 6: 0 Item 7: 9,711,672 Item 8: 0 Item 9: 9,711,672 Item 11: 12.218% Item 12: IN Cusip # 747906303 Item 1: Reporting Person - Abigail P. Johnson Item 4: United States of America Item 5: None Item 6: None Item 7: 9,711,672 Item 8: None Item 9: 9,711,672 Item 11: 12.218% Item 12: IN SCHEDULE 13G - TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b) Item 1(a). Name of Issuer: Quantum Corporation Item 1(b). Name of Issuer's Principal Executive Offices: 500 McCarthy Boulevard Milpitas, CA 95035 Item 2(a). Name of Person Filing: FMR Corp. Item 2(b). Address or Principal Business Office or, if None, Residence: 82 Devonshire Street, Boston, Massachusetts 02109 Item 2(c). Citizenship: Not applicable Item 2(d). Title of Class of Securities: Hard Disk Drive group common stock Item 2(e). CUSIP Number: 747906303 Item 3. This statement is filed pursuant to Rule 13d-1(b) or 13d- 2(b) and the person filing, FMR Corp., is a parent holding company in accordance with Section 240.13d-1(b)(ii)(G). (Note: See Item 7). Item 4. Ownership (a) Amount Beneficially Owned: 9,711,672 (b) Percent of Class: 12.218% (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote: 398,936 (ii) shared power to vote or to direct the vote: 0 (iii) sole power to dispose or to direct the disposition of: 9,711,672 (iv) shared power to dispose or to direct the disposition of: 0 Item 5. Ownership of Five Percent or Less of a CommonStock. Not applicable. Item 6. Ownership of More than Five Percent on Behalf of Another Person. Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Hard Disk Drive group common stock of Quantum Corporation. No one person's interest in the Hard Disk Drive group common stock of Quantum Corporation is more than five percent of the total outstanding Hard Disk Drive group common stock. Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company. See attached Exhibit(s) A, B. Item 8. Identification and Classification of Members of the Group. Not Applicable. See attached Exhibit A. Item 9. Notice of Dissolution of Group. Not applicable. Item 10. Certification. By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such purpose or effect. Signature After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this Schedule 13G in connection with FMR Corp.'s beneficial ownership of the Hard Disk Drive group common stock of Quantum Corporation at October 31, 2000 is true, complete and correct. November 10, 2000 Date /s/Frank V. Knox Signature Frank V. Knox Vice President and Compliance Officer FMR Co. Duly authorized under Powers of Attorney dated October 24, 2000 by Eric D. Roiter by and on behalf of FMR Corp. and its direct and indirect subsidiaries, and Fidelity International Limited and its direct and indirect subsidiaries. SCHEDULE 13G - TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b) Pursuant to the instructions in Item 7 of Schedule 13G, Fidelity Management & Research Company ("Fidelity"), 82 Devonshire Street, Boston, Massachusetts 02109, a wholly-owned subsidiary of FMR Corp. and an investment adviser registered under Section 203 of the Investment Advisers Act of 1940, is the beneficial owner of 9,300,882 shares or 11.702% of the Hard Disk Drive group common stock outstanding of Quantum Corporation ("the Company") as a result of acting as investment adviser to various investment companies registered under Section 8 of the Investment Company Act of 1940. The number of shares of Hard Disk Drive group common stock of Quantum Corporation owned by the investment companies at October 31, 2000 included 256,980 shares of Hard Disk Drive group common stock resulting from the assumed conversion of $23,810,000 principal amount of QUANTUM CORP 7% CSD 8/1/04 (10.793 shares of Hard Disk Drive group common stock for each $1,000 principal amount of debenture). Edward C. Johnson 3d, FMR Corp., through its control of Fidelity, and the funds each has sole power to dispose of the 9,300,882 shares owned by the Funds. Neither FMR Corp. nor Edward C. Johnson 3d, Chairman of FMR Corp., has the sole power to vote or direct the voting of the shares owned directly by the Fidelity Funds, which power resides with the Funds' Boards of Trustees. Fidelity carries out the voting of the shares under written guidelines established by the Funds' Boards of Trustees. Fidelity Management Trust Company, 82 Devonshire Street, Boston, Massachusetts 02109, a wholly-owned subsidiary of FMR Corp. and a bank as defined in Section 3(a)(6) of the Securities Exchange Act of 1934, is the beneficial owner of 410,790 shares or 0.516% of the Hard Disk Drive group common stock outstanding of the Company as a result of its serving as investment manager of the institutional account(s). The number of shares of Hard Disk Drive group common stock of Quantum Corporation owned by the institutional account(s) at October 31, 2000 included 5,827 shares of Hard Disk Drive group common stock resulting from the assumed conversion of 540,000 shares of the QUANTUM CORP 7% CSD 8/1/04 described above. Edward C. Johnson 3d and FMR Corp., through its control of Fidelity Management Trust Company, each has sole dispositive power over 410,790 shares and sole power to vote or to direct the voting of 398,936 shares, and no power to vote or to direct the voting of 11,854 shares of Hard Disk Drive group common stock owned by the institutional account(s) as reported above. Strategic Advisers, Inc., 82 Devonshire Street, Boston, MA 02109, a wholly-owned subsidiary of FMR Corp. and an investment adviser registered under Section 203 of the Investment Advisers Act of 1940, provides investment advisory services to individuals. It does not have sole power to vote or direct the voting of shares of certain securities held for clients and has sole dispositive power over such securities. As such, FMR Corp.'s beneficial ownership may include shares beneficially owned through Strategic Advisers, Inc. Members of the Edward C. Johnson 3d family are the predominant owners of Class B shares of common stock of FMR Corp., representing approximately 49% of the voting power of FMR Corp. Mr. Johnson 3d owns 12.0% and Abigail Johnson owns 24.5% of the aggregate outstanding voting stock of FMR Corp. Mr. Johnson 3d is Chairman of FMR Corp. and Abigail P. Johnson is a Director of FMR Corp. The Johnson family group and all other Class B shareholders have entered into a shareholders' voting agreement under which all Class B shares will be voted in accordance with the majority vote of Class B shares. Accordingly, through their ownership of voting common stock and the execution of the shareholders' voting agreement, members of the Johnson family may be deemed, under the Investment Company Act of 1940, to form a controlling group with respect to FMR Corp. SCHEDULE 13G - TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b) RULE 13d-1(f)(1) AGREEMENT The undersigned persons, on November 10, 2000, agree and consent to the joint filing on their behalf of this Schedule 13G in connection with their beneficial ownership of the Hard Disk Drive group common stock of Quantum Corporation at October 31, 2000. FMR Corp. By /s/Frank V. Knox _________________ Frank V. Knox Vice President and Compliance Officer FMR Co. Duly authorized under Powers of Attorney dated October 24, 2000 by Eric D. Roiter by and on behalf of FMR Corp. and its direct and indirect subsidiaries, and Fidelity International Limited and its direct and indirect subsidiaries. Edward C. Johnson 3d By /s/Frank V. Knox _________________ Frank V. Knox Vice President and Compliance Officer FMR Co. Duly authorized under Powers of Attorney dated October 24, 2000 by Eric D. Roiter by and on behalf of Edward C. Johnson 3d Abigail P. Johnson By /s/Frank V. Knox_________________ Frank V. Knox Vice President and Compliance Officer FMR Co. Duly authorized under Powers of Attorney dated October 24, 2000 by Eric D. Roiter by and on behalf of Abigail P. Johnson Fidelity Management & Research Company By /s/Frank V. Knox ________________ Frank V. Knox Vice President and Compliance Officer FMR Co. Duly authorized under Powers of Attorney dated October 24, 2000 by Eric D. Roiter