Seagate (STX) guides on its FQ4 earnings call (webcast) for FQ1 revenue of $4B, -11% Q/Q and easily below a $4.62B consensus. Gross margin is expected to fall another 360 bps Q/Q to 30%. The numbers contrast greatly with Western Digital's strong FY13 forecast. STX now -7.1% AH. WDC -1.6%. Chip suppliers LSI and Marvell (MRVL - previous) could also see weakness. Also: Seagate has hired Micron (MU) enterprise solid-state drive (SSD) chief Gary Gentry to run its SSD unit.