High Speed Embedded Memory

thanks guys for fantastic comments. they are really helpful and really appreciated. Multiple Compact Flash solution is a good idea which I had it in mind. this is possibly the easiest and the cheapest one. Unfortunately, connection over cable is not possible due to amount a vibration and shock. We tried this several time previously and 80% of the time we end up system failure which cost us a lot. I searched on the internet and found Solid State card such as Intel® Solid-State Drive 310 Series and above. the size of it as small as credit card and power consumption is not that bad and we can cope with it. I just want to know that have you guys ever interfaced Altera FPGAs with SSDs.(SATA) Currently, we are using Cyclone III. I think we may have some difficulty interfacing SSD with cyclone III. it seems they don't support it. any recommendation again greatly appreciated.