WD had released another 4TB enterprise hard drive, the made by its Hitachi Global Storage Technologies (HGST) unit, in April.

WD completed its , now known as Viviti Technologies Ltd., in March

WD today expanded its enterprise-class storage offerings with the release of new WD RE SAS and WD RE SATA hard drives that offer capacities of up to 4 TB, said to be the highest available capacity today.

The RE drives are available in 1 TB, 2 TB, 3 TB and 4 TB capacities for nearline SAS (serial-attached SCSI) and 2 TB, 3 TB and 4 TB for drives based on the lower-performance SATA (serial ATA) specification.

The RE SAS drives have a sustained sequential data transfer rate of up to 182 MB/s, while the RE SATA drives have a sustained sequential data transfer rate of up to 171 MB/s.