Western Digital is well known for its ranges of hard drives: these are the models: Green, Black or Velociraptor. Until now, they were confined to the SATA interface certainly aimed for the general public, but still largely supplanted in the world of the servers by SAS. They have just announce the first disk with this standard, the S25.
To keep this short, this disk is on all points similar to Velociraptor on the level of the capacity (147 or 300 GB) and also on the level of the performances except for the new interface. Thus, Western comes out to hunt in the grounds of Seagate who still reigns as a master in the market of SAS 2,5" disks.
