FN mtu 9000 ds4k/raid5 centos/btrfs basic test-1: Processor: 4 x Intel Xeon E7 4870 (8 Cores), Motherboard: Intel 440BX (6.00 BIOS), Chipset: Intel 440BX/ZX/DX, Memory: 2 x 16384 MB DRAM, Disk: 64GB Virtual disk, Graphics: VMware SVGA II, Network: VMware VMXNET3 OS: CentOS Linux 7, Kernel: 3.10.0-514.el7.x86_64 (x86_64), Compiler: GCC 4.8.5 20150623, File-System: btrfs, Screen Resolution: 1176x885, System Layer: VMware IOzone 3.465 Record Size: 1MB - File Size: 4GB - Disk Test: Read Performance MB/s > Higher Is Better test-1 . 2683.78 |============================================================= IOzone 3.465 Record Size: 4Kb - File Size: 4GB - Disk Test: Read Performance MB/s > Higher Is Better test-1 . 2261.53 |============================================================= IOzone 3.465 Record Size: 1MB - File Size: 4GB - Disk Test: Write Performance MB/s > Higher Is Better test-1 . 327.16 |============================================================== IOzone 3.465 Record Size: 4Kb - File Size: 4GB - Disk Test: Write Performance MB/s > Higher Is Better test-1 . 328.72 |============================================================== IOzone 3.465 Record Size: 64Kb - File Size: 4GB - Disk Test: Read Performance MB/s > Higher Is Better test-1 . 2723.99 |============================================================= IOzone 3.465 Record Size: 64Kb - File Size: 4GB - Disk Test: Write Performance MB/s > Higher Is Better test-1 . 341.93 |==============================================================