Despite today's unveiling of the Xsan 2 file system, Apple quietly discontinued the Xserve RAID platform, with any references to the hard drive system absent from the online store. The only mention of enterprise-level RAID hard drive products is that of the Promise VTrak system, for which Apple is also selling a number of service parts as well. The VTrak RAID systems range from 4.8TB to 16TB, and are configured with either SATA or SAS drives.
It is unclear if Apple is making another approach to the RAID system, or if it is just simplifying its offerings.
