DataMirror Announces Renewal of Normal Course Issuer Bid

TORONTO and SANTA CLARA, Calif., – DataMirror Corporation (NASDAQ: DMCX - News; TSX: DMC - News ), a leading real-time data integration company, today announced acceptance by the Toronto Stock Exchange of Notice of its Normal Course Issuer Bid, allowing the purchase from time to time, if it is considered advisable, of up to 423,891 of its common shares, which represents 5% of its 8,477,810 outstanding common shares (as at September 14, 2005), on The Toronto Stock Exchange over the next 12 months. The Board of Directors of DataMirror believes that such purchases are in the best interests of the Company and a desirable use of corporate funds. Over the period from September 21, 2004 to September 14, 2005, the Company has purchased and cancelled 549,400 of its common shares at an average price of Cdn $9.40 per share under a previous Normal Course Issuer Bid, in effect from September 21, 2004 to September 20, 2005. Purchases of common shares may be made pursuant to the new Notice in the 12 month period commencing September 21, 2005 and ending September 20, 2006. All common shares purchased by DataMirror pursuant to this Notice will be cancelled.

About DataMirror
DataMirror (NASDAQ: DMCX - News; TSX: DMC - News), a leading provider of real-time data integration, protection and java database solutions, improves the integrity and reliability of information across all of the systems that create and store data. DataMirror's flexible and affordable integration solutions allow customers to easily and continuously detect, translate, and communicate information changes throughout the enterprise. DataMirror helps clients make better decisions by providing access to the continuous, accurate information they need to take timely action and move forward faster.

Over 2,000 companies have gained tangible competitive advantage from DataMirror software, including Debenhams, FedEx Ground, First American Bank, OshKosh B'Gosh, Priority Health, Tiffany & Co., and Union Pacific Railroad. DataMirror is headquartered in Markham, Canada and has offices around the globe. For more information, visit www.datamirror.com.

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"Safe Harbour" Statement under the United States Private Securities Litigation Reform Act of 1995:

Forward-looking statements in this press release, including statements regarding DataMirror Corporation's business which are not historical facts, are made pursuant to the "safe harbour" provisions of the United States Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements of plans, objectives, strategies and expectations. The words "anticipate", "believe", "estimate" and "expect" and similar expressions are intended to identify forward-looking statements. Numerous important factors affect DataMirror's operating results and could cause DataMirror's actual results to differ materially from the results indicated by this press release or by any forward-looking statements made by, or on behalf of, DataMirror, and there can be no assurance that future results will meet expectations, estimates or projections. These factors include, but are not limited to, the following: the difficulty of developing, marketing and selling new products successfully; variability of quarterly operating results; dependence upon the continued growth and success of DataMirror's software products; competition; rapid technological change and new product introductions; dependence upon continued growth in the database and enterprise data integration markets; dependence upon relationships with complementary vendors and distribution channels; the ability to recruit and retain key personnel; risks of international operations, including currency exchange rate fluctuations and global economic conditions; possible software errors or defects; possible infringement claims by third parties; and other factors discussed in the DataMirror's Annual Information Form and other periodic filings with the United States Securities and Exchange Commission and other regulatory authorities. Should one or more of these risks or uncertainties materialize, or should assumptions underlying the forward-looking statements prove incorrect, actual results may vary materially from those indicated in any forward-looking statements. DataMirror disclaims and does not assume any obligation to update these forward-looking statements.

Copyright 2005 DataMirror Corporation. All rights reserved. DataMirror, LiveBusiness and The experience of now are trademarks or registered trademarks of DataMirror Corporation. All other brand or product names are trademarks or registered trademarks of their respective companies.

Contacts:
Tom Giantsopoulos, Corporate Communications, DataMirror Corporation, 905-415-0310 ext. 153, tgiantsopoulos@datamirror.com; Peter Cauley, Chief Financial Officer, DataMirror Corporation, 905-415-0310 ext. 271, pcauley@datamirror.com.

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