MCDATA CORP

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Registration statement under Securities Act of 1933 (amendment)

Letter from the SEC

Registration statement under Securities Act of 1933

Notice of Effectiveness

No description available

Post-effective amendment to a registration statement

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

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

Other Events

Written communication about a business combination transaction (Rule 425)

8.01,9.01

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)

General form for quarterly reports under Section 13 or 15(d)

Written communication about a business combination transaction (Rule 425)

No description available

Written communication about a business combination transaction (Rule 425)

2.02,7.01,9.01

2.02,7.01,9.01

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Entry into a Material Definitive Agreement

8.01

9.01

8.01

General form for quarterly reports under Section 13 or 15(d)

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

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

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

8.01

5.02,8.01

2.02,7.01,9.01

Results of Operations and Financial Condition

Annual report pursuant to Section 13 or 15(d)

Notification of late filing of Form 10-K

5.02

Results of Operations and Financial Condition

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

General form for quarterly reports under Section 13 or 15(d)

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

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d) (amendment)

Annual report pursuant to Section 13 or 15(d) (amendment)

General form for quarterly reports under Section 13 or 15(d) (amendment)

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d) (amendment)

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d) (amendment)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

06

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

WALKER LAURENCE G

JONES ADRIAN

Frendo Michael

Oseth Todd

JOHNSTON CHARLES C

SKILLING DAVID VAN

UHLMAN THOMAS M

MCGIMPSEY THOMAS O

GERDELMAN JOHN W