Data storage company

Network Appliance

(NTAP) - Get Report

was up 6.5% in preopen

Island

trading.

After the close Thursday, the company

posted fourth-quarter operating earnings of 11 cents per share, beating the Street's estimate of 10 cents and the year-ago 6 cents. The company's earnings guidance for 2001 and 2002 was in line with analysts' estimates.