The CEO added that the product issue impacted enterprise product shipments by around 1.5 million units and drove non-GAAP gross margin below Seagate's targeted plan. The hard drive specialist was another active premarket Nasdaq stock on share volume of 153,777. Seagate's numbers also weighed heavily on rival Western Digital ( WDC) on Friday, pushing the company's shares down 2.38% to $29.95 before market open. Xyratex ( XRTX) shares, however, rose on the storage specialist's robust third-quarter guidance, announced with its second-quarter results after market close on Thursday. Shares of the data storage company climbed 7.34% to $12.58 before market open on Friday. Apple ( AAPL) shares, which surpassed $600 on Thursday, dipped 0.95% to $605.97 in premarket trading. --Written by James Rogers in New York. Follow @jamesjrogers >To submit a news tip, send an email to: email@example.com. Check out our new tech blog, Tech Trends. Follow TheStreet Tech on your wireless devices.