The GS70 Stealth uses a RAID 0 configuration of mSATA drives, and a 750GB mechanical drive for storage duties.
The two 1.8 inch Solid State Drives score very well in Raid, around 1000MB/s in the sequential read test in CrystalDiskMark. There is a slight write improvement when enabling the 0x00 mode which deals with compressible data.
The 750GB hard drive isn't in the same performance category, but for a mechanical 2.5 inch drive these results are as good as you are likely to see.
The ATTO Disk Benchmark performance measurement tool is compatible with Microsoft Windows. Measure your storage systems performance with various transfer sizes and test lengths for reads and writes. Several options are available to customize your performance measurement including queue depth, overlapped I/O and even a comparison mode with the option to run continuously. Use ATTO Disk Benchmark to test any manufacturers RAID controllers, storage controllers, host adapters, hard drives and SSD drives and notice that ATTO products will consistently provide the highest level of performance to your storage.
The rates in this benchmark are higher than CrystalDiskMark. The Raid 0 SSD's score around 1000MB/s read and peak at 980 MB/s write. The 750GB HDD scores around 120 MB/s in both the read and write tests.