M-Systems offers 2.5" IDE Plus Fast Flash Disks for embedded applications with upto 21.5Gbyte capacity. Budgetary price for 21.5GB is less than $11,000.

Environmental
Operating temperature
Commercial: 0°C to +70°C
Enhanced: -25°C to +75°C
Extended: -40°C to +85°C
Storage temperature: -55°C to +95°C
Humidity: 5% to 95% relative, non-condensing
Operating altitude: Up to 80,000 feet
Operating shock: 1,500G, MIL-STD-810F
Operating vibration: 16.3G RMS (random, 20Hz to 2000Hz;
3 vibration axes), MIL-STD-810F