Western Digital to seek injunction to block Toshiba's $18 billion chip unit sale

By Makiko Yamazaki and Sam NusseyTOKYO (Reuters) - Western Digital Corpsaid on Tuesday it will seek an injunction to block the sale of Toshiba Corp'sprized semiconductor business to a rival group, upping the ante in anacrimonious battle with its chip venture partner.The latest legal action by the U.S. firm, which jointly invests in Toshiba's main chip plant, comes in the wake of the Japanese conglomerate's decision last week to sell the unit to a consortium led by Bain Capital LP and South Korea