content: <PAGE>
  
  
                         SECURITIES AND EXCHANGE COMMISSION
                                Washington, DC 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 1, 2001
  
  
                                  ONI SYSTEMS CORP.
  --------------------------------------------------------------------------------
               (Exact Name of Registrant as Specified in Its Charter)
  
  
  
                                      Delaware
  --------------------------------------------------------------------------------
                   (State or Other Jurisdiction of Incorporation)
  
  
  
                    000-30633                              77046-9657
  --------------------------------------     -------------------------------------
        (Commission File Number)                 (IRS Employer Identification No.)
  
  
  
        5965 Silver Creek Valley Road, San Jose, California            95138
  --------------------------------------------------------------------------------
        (Address of Principal Executive Offices)                    (Zip Code)
  
  
  
                                   (408) 965-2600
  --------------------------------------------------------------------------------
                (Registrant's Telephone Number, Including Area Code)
  
  
  
         166 Baypointe Parkway, San Jose, California               95134-1621
  --------------------------------------------------------------------------------
            (Former Name or Former Address, if Changed Since Last Report)
  
  
  
  <PAGE>
  
  Item 5:       Other Events
  
       ONI Systems Corp. has promoted William R. Cumpston from executive vice
  president of engineering and operations to the newly created position of chief
  operating officer. Separately, Chris A. Davis, executive vice president, chief
  administrative and financial officer, is leaving ONI Systems. Ken Burckhardt,
  vice president of finance, will act as ONI Systems interim chief financial
  officer.
  
  
  <PAGE>
  
                                      SIGNATURE
  
           Pursuant to the requirements of the Securities Exchange Act of 1934,
  the registrant has duly caused this report to be signed on its behalf by the
  undersigned hereunto duly authorized.
  
  Date:    August 1, 2001
  
                                  ONI SYSTEMS CORP.
  
                                  By: /s/ Hugh C. Martin
                                      -----------------------------------------
                                      Hugh C. Martin
                                      President, Chief Executive Officer and
                                      Chairman of the Board of Directors
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text: SECURITIES AND EXCHANGE COMMISSION
                                Washington, DC 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 1, 2001
  
                                  ONI SYSTEMS CORP.
  --------------------------------------------------------------------------------
               (Exact Name of Registrant as Specified in Its Charter)
  
                                      Delaware
  --------------------------------------------------------------------------------
                   (State or Other Jurisdiction of Incorporation)
  
                    000-30633                              77046-9657
  --------------------------------------     -------------------------------------
        (Commission File Number)                 (IRS Employer Identification No.)
  
        5965 Silver Creek Valley Road, San Jose, California            95138
  --------------------------------------------------------------------------------
        (Address of Principal Executive Offices)                    (Zip Code)
  
                                   (408) 965-2600
  --------------------------------------------------------------------------------
                (Registrant's Telephone Number, Including Area Code)
  
         166 Baypointe Parkway, San Jose, California               95134-1621
  --------------------------------------------------------------------------------
            (Former Name or Former Address, if Changed Since Last Report)
  Item 5:       Other Events
  
       ONI Systems Corp. has promoted William R. Cumpston from executive vice
  president of engineering and operations to the newly created position of chief
  operating officer. Separately, Chris A. Davis, executive vice president, chief
  administrative and financial officer, is leaving ONI Systems. Ken Burckhardt,
  vice president of finance, will act as ONI Systems interim chief financial
  officer.
  SIGNATURE
  
           Pursuant to the requirements of the Securities Exchange Act of 1934,
  the registrant has duly caused this report to be signed on its behalf by the
  undersigned hereunto duly authorized.
  
  Date:    August 1, 2001
  
                                  ONI SYSTEMS CORP.
  
                                  By: /s/ Hugh C. Martin
                                      -----------------------------------------
                                      Hugh C. Martin
                                      President, Chief Executive Officer and
                                      Chairman of the Board of Directors