MCDATA CORP

Q: Oct 31 2006

Q: Jul 31 2006

Q: Apr 30 2006

FY: Jan 31 2006

FY: Jan 31 2006

Q: Oct 31 2005

Q: Jul 31 2005

Q: Apr 30 2005

FY: Jan 31 2005

Q: Oct 31 2004

Q: Jul 31 2004

Q: Apr 30 2004

FY: Jan 31 2004

Q: Oct 31 2003

Q: Apr 30 2004

FY: Jan 31 2004

FY: Jan 31 2004

Q: Oct 31 2003

Q: Oct 31 2003

Q: Jul 31 2003

Other Events

8.01,9.01

2.02,7.01,9.01

2.02,7.01,9.01

Entry into a Material Definitive Agreement

8.01

9.01

8.01

2.02,7.01,9.01

Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers

1.01,3.03,7.01,9.01

5.02

2.02,7.01,9.01

8.01

8.01

5.02,8.01

2.02,7.01,9.01

Results of Operations and Financial Condition

5.02

Results of Operations and Financial Condition

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Notice of Effectiveness

No description available

Post-effective amendment to a registration statement

Certification of termination of registration of a class of securities (Section 12(g))

Notification of removal from listing and/or registration on a national securities exchange

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

No description available

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

BARCLAYS GLOBAL INVESTORS NA /CA/

RENAISSANCE TECHNOLOGIES CORP

ABN AMRO HOLDING N V

SAC CAPITAL ADVISORS LLC

Black River Asset Management LLC

D. E. Shaw Valence Portfolios, L.L.C.

D. E. Shaw Valence Portfolios, L.L.C.

RENAISSANCE TECHNOLOGIES CORP

DIMENSIONAL FUND ADVISORS INC

PRESIDENT & FELLOWS OF HARVARD COLLEGE

DIMENSIONAL FUND ADVISORS INC

WALKER LAURENCE G

JONES ADRIAN

Frendo Michael

Oseth Todd

JOHNSTON CHARLES C

SKILLING DAVID VAN

UHLMAN THOMAS M

MCGIMPSEY THOMAS O

GERDELMAN JOHN W

Letter from the SEC

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

06