https://www.reuters.com/article/us-toshiba-accounting/western-digital-ceo-apologized-to-toshiba-for-friction-over-chip-unit-sale-idUSKCN1BC42M >Western Digital Corp's CEO apologized to his counterpart at Toshiba Corp for strained ties after the U.S. firm sued to keep their chip joint venture from being sold to rival bidders, according to an Aug. 11 letter.