Exhibit 10.1

Elliott Associates, L.P.

Elliott International, L.P.

Elliott International Capital Advisors Inc.

40 West 57th Street

New York, NY 10019

September 19, 2013

Emulex Corporation

3333 Susan Street

Costa Mesa, California 92626

Ladies and Gentlemen:

Reference is made to the letter agreement dated March 27, 2013 (as amended on
August 9, 2013, the “Letter Agreement”), among Emulex Corporation (the
“Company”) and each of Elliott Associates, L.P. (“Elliott”), Elliott
International, L.P. (“Elliott International”) and Elliott International Capital
Advisors Inc. (“EICA”) (Elliott, Elliott International and EICA, collectively,
the “Elliott Group” and, together with the Company, the “Parties”). Capitalized
terms used but not defined herein have the meaning assigned to them in the
Letter Agreement.

The Parties hereby agree that (1) Paragraph 2(a)(x)(1) of the Letter Agreement
is hereby amended to replace “September 20, 2013” with “October 20, 2013” and
(2) the 2013 annual meeting of stockholders of the Company (and any special
meeting of stockholders at which directors are to be elected pursuant to the
Company’s notice of meeting) will be no earlier than December 17, 2013 and no
later than February 14, 2014; provided that, unless ordered by a court, it will
also not be held on or between December 19, 2013 and January 19, 2014; provided,
further, that the Company shall use commercially reasonable efforts to avoid the
entry of such an order prior to January 20, 2014.

The Company represents and warrants that the Company’s Amended and Restated
Bylaws have been amended, effective as of the date hereof and subject to the
execution and delivery of this letter agreement by the Elliott Group, as
follows:

a) the last sentence of Section 3.18(a) of such Bylaws is replaced in its
entirety with the following:

Notwithstanding anything to the contrary in these Bylaws, in order for a
nomination to be timely for election of directors at the 2013 annual meeting of
stockholders of the corporation (or any special meeting of stockholders held
after September 19, 2013 and before February 14, 2014, at which directors are to
be elected (a “special director election”)), a stockholder’s notice shall be
delivered to or mailed and received at the principal executive office of the
corporation not later than the close of

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business on October 30, 2013, and no earlier than the close of business on
September 30, 2013.

b) the last sentence of Section 2.14(a) of such Bylaws is replaced in its
entirety with the following:

Notwithstanding anything to the contrary in these Bylaws, in order for a
stockholder notice of business to be brought before the 2013 annual meeting of
stockholders (or any special director election (as defined in Section 3.18(a) of
these Bylaws)) to be timely, a stockholder’s notice shall be delivered to or
mailed and received at the principal executive office of the corporation not
later than the close of business on October 30, 2013 and no earlier than the
close of business on September 30, 2013.

The Company and the Elliott Group each agree not to distribute to stockholders
or file with the United States Securities and Exchange Commission any proxy
statement related to the 2013 annual meeting of stockholders of the Company or
any special director election (as defined above), whether definitive or
preliminary, on or before November 10, 2013.

As amended hereby, the Letter Agreement remains in full force and effect.

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If you are in agreement with the foregoing, please sign and return one copy of
this agreement, which thereupon will constitute our binding agreement with
respect to the subject matter hereof.

 

Sincerely,

ELLIOTT ASSOCIATES, L.P.

By: Elliott Capital Advisors, L.P., its General Partner

By: Braxton Associates, Inc., its General Partner

By:  

 /s/ Elliot Greenberg

Name:  Elliot Greenberg Title:    Vice President

ELLIOTT INTERNATIONAL, L.P.

By: Elliott International Capital Advisors Inc., as Attorney-in-Fact

By:  

 /s/ Elliot Greenberg

Name:  Elliot Greenberg Title:    Vice President

ELLIOTT INTERNATIONAL CAPITAL ADVISORS INC. By:  

 /s/ Elliot Greenberg

Name:  Elliot Greenberg Title:    Vice President

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ACCEPTED AND AGREED: EMULEX CORPORATION By:  

 /s/ Susan Bowman

Name:  Susan Bowman Title:    SVP Human Resources