UPDATE 2-Seagate raises Q4 revenue outlook

* Seagate sees Q4 revenue at $2.2 bln to $2.3 bln

* Expects revenue improvement will continue next quarter

* Stock up 2.3 pct in after-hours trading (Adds analyst comment, background)

By David Lawsky

SAN FRANCISCO, June 24 (Reuters) - Seagate (STX.O) raised its fourth-quarter revenue forecast and predicted a stronger-than-expected recovery in global disk drive demand on Wednesday.

Shares in the maker of hard disk drives rose more than 2 percent. Analysts said that with demand for personal computers generally increasing, the market had been expecting the company to raise its forecast.

"This is not a surprise," said Ashok Kumar of Collins Stewart. "We are seeing a production ramp."

Seagate forecast revenue of $2.2 billion to $2.3 billion in the fourth quarter ending July 3, up from its view in April of $1.9 billion to $2.2 billion.

The average analyst forecast was for $2.1 billion, according to Reuters Estimates. Seagate said it had been helped by operational efficiencies, in addition to improved market conditions.