Hi skylarking,
You are absolutely correct. There should be 2 HDD in the system for IRST to work. However, the second HDD should be an mSATA drive or SSD. The difference between conventional HDD and mSATA drive is that it has no moving or rotating parts and store data on a chip. The mSATA drive is used for cache purpose to give faster boot to the system. Data can also be saved at the same time on the mSATA drive. Some of the benefits of SSD are:
- Faster — The SSD has much faster access times than a conventional hard drive. In some tests, the operating system loaded almost twice as fast.
- More reliable — The drive has no moving parts, it is more reliable than standard hard drives or other drives that require motion to work.
- More durable — No moving parts also will result in less chance of damage from bumps or impacts.
- Improved power savings — Conventional hard drives require motors to spin the platters that store data. Eliminating the motor on an SSD creates power savings, which in turn results in longer battery life.
Hope this helps. Please feel free to reply for any further questions.
