Data-storage company NetApp (NASDAQ:NTAP) is preparing to announce layoffs of about 10 percent of its workforce, according to United Kingdom-based IT publication The Register.

The Register cites a private note from Piper Jaffray to its clients, which says the layoffs will total about 1,300 people and will come from under-performing operations, such as Engenio, the external disk storage business that NetApp acquired from LSI Corporation in 2011 for $480 million.

Sunnyvale, Calif.-based NetApp operates has its second-largest site in Research Triangle Park. According to its fiscal 2012 annual report, the company employed a total of 12,149 employees as of April 27, 2012, a 19 percent increase over the prior year that came from both organic growth as well as acquisitions.

The Register said it confirmed the 1,300 layoff number with two unnamed independent sources. It added that it has received information from another unnamed source saying that NetApp UK is laying off staff.

NetApp declined to comment, telling The Register that the company is in a quiet period as it approaches the release of its fiscal fourth quarter financial results and cannot comment. NetApp is scheduled to release its fourth quarter and fiscal 2013 results on May 21.