Quote - In my drawer, i have a compactflash-to-SATA adaptator and a 266x compact flash card. I forecast to build a speed SSD with this (for only 100€) to use for a system cache partition (where poser will be)
thanks again for all !

Flash cards are actually much slower then modern hard disks. Any recent HDD of 1+ TB with decent amount of cache can do a burst transfer of over 100MB/s and sustained of over 70MB/s Compared to this flash cards, even the 266x can do only 10-15MB/s max.

IMO you'd be much better off getting a WD caviar 1TB or something like that, which will cost you about the same 100€ and will give you a lot more space to play with.