NetApp (NTAP) shares are down sharply in after hours trading on a disappointing outlook for the company’s fiscal first quarter ending July.

For its fiscal Q4 ended April 25, the company posted revenue of $938 million and non-GAAP profits of 38 cents; the Street had expected $938 million and 36 cents.

For FY Q1, the company sees revenue of $845 million to $875 million, with non-GAAP profits of 20-23 cents a share. The Street consensus has been $870.9 million and 27 cents.

NetApp repeated its previous guidance for the full fiscal year ending April 2009 for profits of $1.40 to $1.46 a share; that is consistent with the Street consensus of $1.43.

In after hours trading, the enterprise storage provider’s shares are down $2.87, or 11.1%, to $22.92.