Hitachi Ltd. said Monday it has again postponed the sale of its U.S. hard-disk drive-making unit to a U.S. company because the European Commission is taking more time than expected to screen the deal.

The sale of Hitachi Global Storage Technologies Ltd. to Western Digital Corp. had previously been postponed from the end of September to sometime in the October-December quarter.

The fresh postponement will have little impact on earnings, the company said.

Hitachi said last month its group net profit for the April-September period plunged 67.8 percent from a year earlier to ¥50.95 billion.

The drop was largely caused by supply chain disruptions and damage caused by the March 11 disasters.