The removable storage in the SI-2K is now a SATA RAID system which can use dual SATA drive magazine configured for either RAID-0 (Uncompressed - Speed) or RAID-1 (Redundancy). You can also use a single SATA in the magazine, for non RAID.
Any 2.5" SATA Solid State Drive (SSD) which can sustain up to 30MB/sec is suitable for CineformRAW recording. This higher data rate is the result of a new improved codec and quality setting with only 3.5:1 coding.
There are several drives to hit the market. Here is a 120GB Super Talent drive for only $640.
http://www.newegg.com/Product/Produc...82E16820609304
For uncompressed recording you can consider drives from M-Tron and MemoRight, which are claiming over 90MB/sec write speeds, as well as some soon to be released units from Intel and Samsung:
http://www.dailytech.com/Samsung+Set...ticle11883.htm