Near line sas are bascially SATA drive that can fit SAS connections.
Same speed really as SATA.
But good if you need 1TB drives in a SAS server, say for backups or something like that.
Not good for first or primary storage in a SAS based srever.
You might as well go with SATA if you want them as main storage.
SAS servers are good for speed and performance.
Collected from: Ryan Berglund from The Planet Live Chat