content: <PAGE>
  
  ================================================================================
  
                        SECURITIES AND EXCHANGE COMMISSION
  
                              WASHINGTON, D.C.  20549
  
  
  
                                     FORM 8-K
                                  CURRENT REPORT
  
  
  
                        Pursuant to Section 13 or 15(d) of
                        the Securities Exchange Act of 1934
  
  
  
  
       Date of Report (Date of earliest event reported):  August 19, 1999
  
  
  
  
  
  
                                QUANTUM CORPORATION
  
              (Exact name of registrant as specified in its charter)
  
  
  
          DELAWARE                 0-12390                     96-2665054
  (State of incorporation)   (Commission File Number)      (IRS Employer
                                                            Identification No.)
  
  
  
                 500 McCARTHY BOULEVARD, MILPITAS, CALIFORNIA 95035
  
              (Address of principal executive offices of Registrant)
  
  
                                  (408) 894-4000
               (Registrant's telephone number, including area code)
  
  ================================================================================
  <PAGE>
  
  Item 5.    Other Events
             ------------
  
       On August 19, 1999, Quantum announced a restructuring of its desktop hard
  disk drive business.  As a result of the restructuring, Quantum's Hard Disk
  Drive Group (HDDG) will reduce its workforce by approximately 750-800 employees
  in HDDG over the next 12 months and record a special charge of approximately $50
  million in the current quarter ending September 26, 1999.  Upon full
  implementation of the restructuring, HDDG currently expects to realize a $100
  million cost savings per year, fully realized beginning in fiscal year 2001.
  
       As part of the restructuring, HDDG will increase its focus on the
  technologies required to bring the highest-quality, lowest-cost desktop products
  to market, while continuing to build a position in the high-performance, 7,200
  RPM segment.  As a result, certain future, unannounced product development
  programs will be consolidated.  These changes, combined with improved
  efficiencies within the business, will result in an immediate reduction in force
  of approximately 115 employees within the desktop hard disk drive business.
  
       HDDG's recently announced Fireball lct is an example of the company's
  increased focus on high quality and low cost.  This product, which is Quantum's
  first in a new generation of drives targeted at the sub-$700 PC market, is
  designed to offer high reliability and low cost across a broad range of desktop
  capacity points.  All of the top PC OEMs are currently qualifying this drive,
  with mass production and first customer shipments scheduled to begin in
  September.
  
       In addition to focusing on lower-cost technologies, HDDG will streamline
  its global logistics model in order to create a faster and more flexible
  fulfillment system for customers worldwide.  This will result in a reduction in
  force of approximately 650-700 employees at Quantum's drive configuration
  centers and warehouses in Milpitas, Calif. and Dundalk, County Louth, Ireland.
  These reductions, combined with the 115 previously mentioned, will result in a
  reduction in force of approximately 750-800 employees in total over the next 12
  months.
  
       The foregoing statements regarding the restructuring of the Hard Disk Drive
  Group's desktop hard drive business, new product introductions and its future
  competitive position in the desktop hard drive market are forward-looking
  statements, and actual events or results may differ materially.  Important
  factors which could affect actual results include (i) the actual amount of the
  special charge related to the restructuring, (ii) the ability of the Hard Disk
  Drive Group to achieve the cost savings currently identified and expected to be
  achieved through the restructuring, (iii) the ability of the Hard Disk Drive
  Group to continue lowering the cost of its desktop hard drives to meet the
  competitive demands of the rapidly growing low-cost PC market, (iv) increased
  price competition in the desktop hard drive market segment, (v) the completion
  of successfully customer qualifications of the Fireball lct and other new
  desktop hard drive products with the top PC OEMs and the ability of MKE to
  quickly achieve volume production of high-quality desktop hard drives at a
  competitive cost, (vi) successful development of technologies required to
  introduce high-quality, low-cost desktop hard drives that achieve market
  acceptance and (vii) the other important risks, uncertainties and cautionary
  statements contained in Quantum's Annual Report on Form 10-K for the fiscal year
  ended March 31, 1999 and the quarterly report on Form 10-Q for the quarter ended
  June 27, 1999. Quantum undertakes no obligation to update such forward-looking
  statements in the future.
  
  
  <PAGE>
  
                                    SIGNATURES
  
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, as
  amended, the registrant has duly caused this report to be signed on its behalf
  by the undersigned hereunto duly authorized.
  
  
                                    QUANTUM CORPORATION
  
  
  Dated:  September 3, 1998         By:  /s/ RICHARD L. CLEMMER
                                         -------------------------------------
                                         Richard L. Clemmer, Executive Vice
                                         President and Chief Financial Officer
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text: ================================================================================
  
                        SECURITIES AND EXCHANGE COMMISSION
  
                              WASHINGTON, D.C.  20549
  
                                     FORM 8-K
                                  CURRENT REPORT
  
                        Pursuant to Section 13 or 15(d) of
                        the Securities Exchange Act of 1934
  
       Date of Report (Date of earliest event reported):  August 19, 1999
  
                                QUANTUM CORPORATION
  
              (Exact name of registrant as specified in its charter)
  
          DELAWARE                 0-12390                     96-2665054
  (State of incorporation)   (Commission File Number)      (IRS Employer
                                                            Identification No.)
  
                 500 McCARTHY BOULEVARD, MILPITAS, CALIFORNIA 95035
  
              (Address of principal executive offices of Registrant)
  
                                  (408) 894-4000
               (Registrant's telephone number, including area code)
  
  ================================================================================
  Item 5.    Other Events
             ------------
  
       On August 19, 1999, Quantum announced a restructuring of its desktop hard
  disk drive business.  As a result of the restructuring, Quantum's Hard Disk
  Drive Group (HDDG) will reduce its workforce by approximately 750-800 employees
  in HDDG over the next 12 months and record a special charge of approximately $50
  million in the current quarter ending September 26, 1999.  Upon full
  implementation of the restructuring, HDDG currently expects to realize a $100
  million cost savings per year, fully realized beginning in fiscal year 2001.
  
       As part of the restructuring, HDDG will increase its focus on the
  technologies required to bring the highest-quality, lowest-cost desktop products
  to market, while continuing to build a position in the high-performance, 7,200
  RPM segment.  As a result, certain future, unannounced product development
  programs will be consolidated.  These changes, combined with improved
  efficiencies within the business, will result in an immediate reduction in force
  of approximately 115 employees within the desktop hard disk drive business.
  
       HDDG's recently announced Fireball lct is an example of the company's
  increased focus on high quality and low cost.  This product, which is Quantum's
  first in a new generation of drives targeted at the sub-$700 PC market, is
  designed to offer high reliability and low cost across a broad range of desktop
  capacity points.  All of the top PC OEMs are currently qualifying this drive,
  with mass production and first customer shipments scheduled to begin in
  September.
  
       In addition to focusing on lower-cost technologies, HDDG will streamline
  its global logistics model in order to create a faster and more flexible
  fulfillment system for customers worldwide.  This will result in a reduction in
  force of approximately 650-700 employees at Quantum's drive configuration
  centers and warehouses in Milpitas, Calif. and Dundalk, County Louth, Ireland.
  These reductions, combined with the 115 previously mentioned, will result in a
  reduction in force of approximately 750-800 employees in total over the next 12
  months.
  
       The foregoing statements regarding the restructuring of the Hard Disk Drive
  Group's desktop hard drive business, new product introductions and its future
  competitive position in the desktop hard drive market are forward-looking
  statements, and actual events or results may differ materially.  Important
  factors which could affect actual results include (i) the actual amount of the
  special charge related to the restructuring, (ii) the ability of the Hard Disk
  Drive Group to achieve the cost savings currently identified and expected to be
  achieved through the restructuring, (iii) the ability of the Hard Disk Drive
  Group to continue lowering the cost of its desktop hard drives to meet the
  competitive demands of the rapidly growing low-cost PC market, (iv) increased
  price competition in the desktop hard drive market segment, (v) the completion
  of successfully customer qualifications of the Fireball lct and other new
  desktop hard drive products with the top PC OEMs and the ability of MKE to
  quickly achieve volume production of high-quality desktop hard drives at a
  competitive cost, (vi) successful development of technologies required to
  introduce high-quality, low-cost desktop hard drives that achieve market
  acceptance and (vii) the other important risks, uncertainties and cautionary
  statements contained in Quantum's Annual Report on Form 10-K for the fiscal year
  ended March 31, 1999 and the quarterly report on Form 10-Q for the quarter ended
  June 27, 1999. Quantum undertakes no obligation to update such forward-looking
  statements in the future.
  SIGNATURES
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, as
  amended, the registrant has duly caused this report to be signed on its behalf
  by the undersigned hereunto duly authorized.
  
                                    QUANTUM CORPORATION
  
  Dated:  September 3, 1998         By:  /s/ RICHARD L. CLEMMER
                                         -------------------------------------
                                         Richard L. Clemmer, Executive Vice
                                         President and Chief Financial Officer