FOR IMMEDIATE RELEASE Exhibit 99.1

Editor’s Contact:
Frank Berry
QLogic Corporation
Phone: (949) 389-6499
frank.berry@qlogic.com

Investor’s Contact:
Jeanie Herbert
QLogic Corporation
Phone: (949) 389-6343
jeanie.herbert@qlogic.com

QLOGIC REPORTS FIRST QUARTER
RESULTS FOR FISCAL YEAR 2009
Record Revenue Achieved

ALISO VIEJO, Calif., July 21, 2008 — QLogic Corp. (NASDAQ:QLGC), a leader in networking for storage and high performance computing (HPC), today announced its first quarter financial results for the period ended June 29, 2008.

First Quarter Highlights

• Net revenue increased 20% from the comparable quarter last year to a record $168.4 million.

• Net income: $31.6 million GAAP, $42.0 million non-GAAP.

• Net income per diluted share: $0.24 GAAP, $0.31 non-GAAP.

• Cash generated from operations was $58.2 million.

• $405.4 million in cash and marketable securities as of June 29, 2008.

Financial Results

Net revenue for the first quarter of fiscal 2009 was $168.4 million and increased 20% from $139.8 million in the comparable quarter last year. Revenue from Host Products, which are comprised primarily of Fibre Channel and iSCSI host bus adapters and InfiniBand host channel adapters, was $120.7 million during the first quarter of fiscal 2009 and increased 16% from $104.2 million in the comparable quarter last year. Revenue from Network Products, which are comprised primarily of Fibre Channel and InfiniBand switches, was $29.9 million during the first quarter of fiscal 2009 and increased 22% from $24.5 million in the comparable quarter last year. Revenue from Silicon Products, which are comprised primarily of protocol chips and management controllers, was $15.6 million during the first quarter of fiscal 2009 and increased 62% from $9.6 million in the comparable quarter last year.

Net income on a GAAP basis for the first quarter of fiscal 2009 was $31.6 million, or $0.24 per diluted share, and increased from $19.0 million, or $0.12 per diluted share for the first quarter of fiscal 2008. Net income on a GAAP basis for the first quarter of fiscal 2009 includes stock-based compensation expense, acquisition-related charges, impairment charges related to marketable securities, and the related income tax effects. Net income on a non-GAAP basis for the first quarter of fiscal 2009 was $42.0 million, or $0.31 per diluted share, and increased from $30.2 million, or $0.20 per diluted share for the first quarter of fiscal 2008.

“We are very pleased with our strong financial performance and the achievement of record revenue during the first quarter,” said H.K. Desai, QLogic’s chief executive officer. “Our strong revenue performance was driven by sequential growth of 9% for both our Host Products and Network Products from the fourth quarter of fiscal 2008.”

QLogic uses certain non-GAAP financial measures to supplement financial statements based on GAAP. A summary of these non-GAAP financial measures and a reconciliation of each non-GAAP financial measure to the most directly comparable GAAP financial measure, as well as a description of the reasons that management believes that these non-GAAP financial measures provide useful information to investors and the additional purposes for which management uses these non-GAAP financial measures is presented in the accompanying financial schedules.

QLogic’s fiscal 2009 first quarter conference call is scheduled for today at 2:30 p.m. Pacific Time (5:30 p.m. Eastern Time). H.K. Desai, chief executive officer, and Simon Biddiscombe, senior vice president and chief financial officer, will host the conference call. The call is being webcast live via the Internet at http://ir.qlogic.com and www.earnings.com. Phone access to participate in the conference call is available at (913) 312-1417, pass code: 4468628.

The financial information that the company intends to discuss during the conference call will be available on the company’s website at http://ir.qlogic.com for twelve months following the conference call. A replay of the conference call will be available via webcast at http://ir.qlogic.com for twelve months.

About QLogic

QLogic is a leading supplier of high performance storage networking solutions, which include the controller chips, host adapters and fabric switches that are the backbone of storage networks for most Global 2000 corporations. The company delivers a broad and diverse portfolio of products that includes Fibre Channel adapters, blade server embedded Fibre Channel switches, Fibre Channel stackable switches, iSCSI adapters and iSCSI routers. The company is also a leading supplier of InfiniBand switches and InfiniBand host channel adapters for the emerging high performance computing market. QLogic products are delivered to small-to-medium businesses and large enterprises around the world via its channel partner community. QLogic products are also powering solutions from leading companies such as Cisco, Dell, EMC, Hitachi Data Systems, HP, IBM, NetApp and Sun Microsystems. QLogic is a member of the S&P 500 Index.

Disclaimer — Forward Looking Statements

This press release contains statements relating to future results of the company (including certain beliefs and projections regarding business trends) that are “forward-looking statements” as defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from those projected or implied in the forward-looking statements. The company advises readers that these potential risks and uncertainties include, but are not limited to: potential fluctuations in operating results; gross margins that may vary over time; revenues may be affected by changes in IT spending levels; the stock price of the company may be volatile; the company’s dependence on the storage area network market; potential adverse effects of server virtualization technology on the company’s business; potential adverse effects of increased market acceptance of blade servers; the ability to maintain and gain market or industry acceptance of the company’s products; the company’s dependence on a limited number of customers; seasonal fluctuations and uneven sales patterns in orders from customers; the company’s ability to compete effectively with other companies; declining average unit sales prices of comparable products; a reduction in sales efforts by current distributors; dependence on sole source and limited source suppliers; the company’s dependence on relationships with certain silicon chip suppliers; declines in the market value of the company’s marketable securities; the complexity of the company’s products; sales fluctuations arising from customer transitions to new products; environmental compliance costs; international economic, regulatory, political and other risks; uncertain benefits from strategic business combinations; the ability to attract and retain key personnel; difficulties in transitioning to smaller geometry process technologies; the ability to protect proprietary rights; the ability to satisfactorily resolve any infringement claims; reliance on third party technology; the use of “open source” software in the company’s products; changes in the company’s tax provisions or adverse outcomes resulting from examination of its income tax returns; computer viruses and other tampering with the company’s computer systems; and facilities of the company and its suppliers and customers are located in areas subject to natural disasters.

More detailed information on these and additional factors which could affect the company’s operating and financial results are described in the company’s Forms 10-K, 10-Q and other reports filed, or to be filed, with the Securities and Exchange Commission. The company urges all interested parties to read these reports to gain a better understanding of the business and other risks that the company faces. The forward-looking statements contained in this press release are made only as of the date hereof, and the company does not intend to update or revise these forward-looking statements, whether as a result of new information, future events or otherwise.

QLogic and the QLogic logo are registered trademarks of QLogic Corporation. Other trademarks and registered trademarks are the property of the companies with which they are associated.

QLOGIC CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(unaudited — in thousands, except per share amounts)

	Three Months Ended
	June 29,		July 1,
	2008		2007
Net revenues	$	168,427	$	139,777
Cost of revenues		55,758		50,863
Gross profit		112,669		88,914
Operating expenses:
Engineering and development		34,367		34,684
Sales and marketing		22,945		21,173
General and administrative		7,576		8,186
Special charges		—		2,136
Total operating expenses		64,888		66,179
Operating income		47,781		22,735
Interest and other income, net		1,539		6,266
Income before income taxes		49,320		29,001
Income taxes		17,673		10,006
Net income	$	31,647	$	18,995
Net income per share:
Basic	$	0.24	$	0.12
Diluted	$	0.24	$	0.12
Number of shares used in per share calculations:
Basic		132,548		153,178
Diluted		133,488		154,219

QLOGIC CORPORATION

RECONCILIATION OF GAAP NET INCOME TO
NON-GAAP NET INCOME

(unaudited — in thousands, except per share amounts)

	Three Months Ended
	June 29,			July 1,
	2008			2007
GAAP net income	$	31,647		$	18,995
Items excluded from GAAP net income:
Stock-based compensation		7,805			8,370
Amortization of purchased intangible assets		3,392			4,433
Acquisition-related stock-based compensation		270			703
Special charges		—			2,136
Impairment of marketable securities		2,698			—
Income tax effect		(3,843	)		(4,456	)
Total non-GAAP adjustments		10,322			11,186
Non-GAAP net income	$	41,969		$	30,181
Net income per diluted share:
GAAP net income	$	0.24		$	0.12
Adjustments		0.07			0.08
Non-GAAP net income	$	0.31		$	0.20

Non-GAAP Financial Measures

The non-GAAP financial measures contained herein are a supplement to the corresponding financial measures prepared in accordance with generally accepted accounting principles (GAAP). The non-GAAP financial measures presented exclude the items summarized in the above table. Management believes that adjustments for these items assist investors in making comparisons of period to period operating results and that these items are not indicative of the company’s on-going core operating performance.

The company has presented non-GAAP net income and non-GAAP net income per diluted share, on a basis consistent with its historical presentation, to assist investors in understanding the company’s core net income and core net income per diluted share on an on-going basis. These non-GAAP financial measures may also assist investors in making comparisons of the company’s core net profitability with historical periods and comparisons of the company’s core net profitability with the corresponding results for competitors. Management believes that non-GAAP net income and non-GAAP net income per diluted share are important measures in the evaluation of the company’s profitability. These non-GAAP financial measures exclude the adjustments described in the above table, and thus provide an overall measure of the company’s on-going net profitability and related profitability on a diluted per share basis.

Management uses non-GAAP net income in its evaluation of the company’s core after-tax results of operations and trends between fiscal periods and believes that this measure is an important component of its internal performance measurement process. In addition, the company prepares and maintains its budgets and forecasts for future periods on a basis consistent with this non-GAAP financial measure. Management believes that providing these non-GAAP financial measures allows investors to view the company’s financial results in the way that management views the financial results.

The non-GAAP financial measures presented herein have certain limitations in that they do not reflect all of the costs associated with the operations of the company’s business as determined in accordance with GAAP. Therefore, investors should consider non-GAAP financial measures in addition to, and not as a substitute for, or as superior to, measures of financial performance prepared in accordance with GAAP. The non-GAAP financial measures presented by the company may be different from the non-GAAP financial measures used by other companies.

For additional information on the items excluded from the non-GAAP financial measures and why the company believes that these non-GAAP financial measures provide useful supplemental information to investors, the company refers you to the Form 8-K regarding this release filed today with the Securities and Exchange Commission.

A summary of the non-GAAP adjustments presented in the table above by the financial statement line impacted is as follows:

	Three Months Ended
	June 29,			July 1,
(unaudited — in thousands)	2008			2007
Non-GAAP Adjustments:
Cost of revenues:
Stock-based compensation	$	479		$	574
Amortization of purchased intangible assets		2,552			3,218
Acquisition-related stock-based compensation		—			(24	)
Total cost of revenue adjustments		3,031			3,768
Operating expenses:
Engineering and development:
Stock-based compensation		4,175			3,772
Amortization of purchased intangible assets		31			173
Acquisition-related stock-based compensation		264			715
Sales and marketing:
Stock-based compensation		1,565			1,625
Amortization of purchased intangible assets		809			1,042
Acquisition-related stock-based compensation		6			12
General and administrative:
Stock-based compensation		1,586			2,399
Special charges		—			2,136
Total operating expense adjustments		8,436			11,874
Interest and other income:
Impairment of marketable securities		2,698			—
Total non-GAAP adjustments before income taxes		14,165			15,642
Income tax effect		(3,843	)		(4,456	)
Total non-GAAP adjustments	$	10,322		$	11,186

QLOGIC CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS

(unaudited — in thousands)

	June 29, 2008			March 30, 2008
ASSETS
Current assets:
Cash and cash equivalents	$	194,764		$	160,009
Short-term marketable securities		171,770			160,497
Accounts receivable, net		86,655			81,642
Inventories		26,227			27,520
Deferred tax assets		30,893			32,227
Other current assets		10,266			8,925
Total current assets		520,575			470,820
Long-term marketable securities		38,877			55,903
Property and equipment, net		91,442			93,726
Goodwill		118,859			127,409
Purchased intangible assets, net		31,054			34,652
Deferred tax assets		30,711			25,870
Other assets		3,423			2,586
	$	834,941		$	810,966
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	37,482		$	35,643
Accrued compensation		19,225			31,120
Accrued taxes		12,582			5,262
Deferred revenue		9,977			8,693
Other current liabilities		7,015			5,952
Total current liabilities		86,281			86,670
Accrued taxes		52,383			48,163
Other liabilities		12,850			10,217
Total liabilities		151,514			145,050
Stockholders’ equity:
Common stock		200			200
Additional paid-in capital		669,325			657,893
Retained earnings		1,116,585			1,084,938
Accumulated other comprehensive income (loss)		798			(2,530	)
Treasury stock		(1,103,481	)		(1,074,585	)
Total stockholders’ equity		683,427			665,916
	$	834,941		$	810,966

QLOGIC CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited — in thousands)

	Three Months Ended
	June 29,			July 1,
	2008			2007
Cash flows from operating activities:
Net income	$	31,647		$	18,995
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		8,341			7,317
Stock-based compensation		7,805			8,370
Acquisition-related:
Amortization of purchased intangible assets		3,392			4,433
Stock-based compensation		270			703
Deferred income taxes		2,731			(6,584	)
Impairment of marketable securities		2,698			—
Provision for losses on accounts receivable		24			70
Loss on disposal of property and equipment		84			473
Changes in operating assets and liabilities:
Accounts receivable		(5,037	)		(3,822	)
Inventories		1,293			955
Other assets		(2,435	)		360
Accounts payable		2,113			1,495
Accrued compensation		(10,458	)		(12,530	)
Accrued taxes		11,540			15,238
Deferred revenue		4,081			719
Other liabilities		143			(665	)
Net cash provided by operating activities		58,232			35,527
Cash flows from investing activities:
Purchases of marketable securities		(35,720	)		(25,463	)
Sales and maturities of marketable securities		44,672			150,099
Additions to property and equipment		(6,209	)		(8,639	)
Acquisition of business		—			67
Net cash provided by investing activities		2,743			116,064
Cash flows from financing activities:
Proceeds from issuance of stock under stock plans		2,024			4,738
Tax effect from issuance of stock under stock plans		(104	)		424
Purchase of treasury stock		(28,140	)		(98,130	)
Net cash used in financing activities		(26,220	)		(92,968	)
Net increase in cash and cash equivalents		34,755			58,623
Cash and cash equivalents at beginning of period		160,009			76,804
Cash and cash equivalents at end of period	$	194,764		$	135,427

QLOGIC CORPORATION

SUPPLEMENTAL FINANCIAL INFORMATION

(unaudited — in thousands)

Net Revenues

A summary of the company’s revenue components is as follows:

	Three Months Ended
	June 29,		July 1,
	2008		2007
Host Products	$	120,650	$	104,208
Network Products		29,903		24,452
Silicon Products		15,555		9,614
Other		2,319		1,503
	$	168,427	$	139,777

Geographic Revenues

Revenues by geographic area are presented based upon the country of destination. Net revenues by geographic area are as follows:

	Three Months Ended
	June 29,		July 1,
	2008		2007
United States	$	80,625	$	77,747
Europe, Middle East and Africa		41,025		30,623
Asia-Pacific and Japan		35,932		23,043
Rest of world		10,845		8,364
	$	168,427	$	139,777