Though Seagate (STX +2.6%) and Western Digital (WDC +2.8%) are up following the former's analyst...

|About: Seagate Technology (STX)|By:, SA News Editor

Though Seagate (STX +2.6%) and Western Digital (WDC +2.8%) are up following the former's analyst day guidance, hard drive controller chip suppliers LSI (LSI -1.1%) and Marvell (MRVL -1.8%) have ticked lower. That's a sign the Street is less pleased with Seagate's unit shipment guidance than it is with its pricing and margin commentary. The shipment guidance arguably has negative implications for PC sales.