Isilon Systems, a Seattle-based digital media storage company, reported a $3.8 million net loss for the first quarter of the year. That compares with a $4.5 million loss for the same period last year.

The company's sales were $21.6 million for the quarter, up from $10.4 million for the same period in 2006.

Isilon said the number of its customers has grown from 180 in March 2006 to 448 at the end of March 2007. It was the second-best quarter in terms of new customer growth in the company's history.