fio_4k_write Intel Core i5-4200U testing with a LENOVO 20B6002XCD (GJET78WW 2.28 BIOS) and Intel Haswell Mobile 1024MB on CentOS Linux 7 via the Phoronix Test Suite. random: Processor: Intel Core i5-4200U @ 2.60GHz (2 Cores / 4 Threads), Motherboard: LENOVO 20B6002XCD (GJET78WW 2.28 BIOS), Chipset: Intel Haswell-ULT DRAM, Memory: 8192MB, Disk: 500GB Seagate ST500LM021-1KJ15 + 16GB SanDisk SSD U110, Graphics: Intel Haswell Mobile 1024MB (1000MHz), Audio: Intel Haswell-ULT HD Audio, Network: Intel Connection I218-V + Realtek RTL8192EE PCIe Wireless OS: CentOS Linux 7, Kernel: 3.10.0-862.6.3.el7.x86_64 (x86_64), Desktop: GNOME Shell 3.25.4, Display Server: X Server 1.19.5, Display Driver: modesetting 1.19.5, OpenGL: 4.5 Mesa 17.2.3, Compiler: GCC 4.8.5 20150623, File-System: xfs, Screen Resolution: 1366x768 Flexible IO Tester 3.1 Type: Random Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory MB/s > Higher Is Better random . 2.89 |================================================================