raid-5-15-posix Running pts/fio-1.8.2 via the Phoronix Test Suite. 4KB seq read: Processor: 2 x Intel Xeon X5450 @ 2.99GHz (8 Cores), Motherboard: Dell 0H603H, Chipset: Intel 5000X MCH, Memory: 16384MB, Disk: 146GB PERC 6/i + 15 x 1000GB PERC 5/E, Graphics: AMD ES1000 128MB, Network: Broadcom NetXtreme II BCM5708 Gigabit OS: Ubuntu 14.04, Kernel: 3.13.0-61-generic (x86_64), Compiler: GCC 4.8.4, File-System: ext4, Screen Resolution: 1024x768 64KB seq read: Processor: 2 x Intel Xeon X5450 @ 2.99GHz (8 Cores), Motherboard: Dell 0H603H, Chipset: Intel 5000X MCH, Memory: 16384MB, Disk: 146GB PERC 6/i + 15 x 1000GB PERC 5/E, Graphics: AMD ES1000 128MB, Network: Broadcom NetXtreme II BCM5708 Gigabit OS: Ubuntu 14.04, Kernel: 3.13.0-61-generic (x86_64), Compiler: GCC 4.8.4, File-System: ext4, Screen Resolution: 1024x768 1024KB seq read: Processor: 2 x Intel Xeon X5450 @ 2.99GHz (8 Cores), Motherboard: Dell 0H603H, Chipset: Intel 5000X MCH, Memory: 16384MB, Disk: 146GB PERC 6/i + 15 x 1000GB PERC 5/E, Graphics: AMD ES1000 128MB, Network: Broadcom NetXtreme II BCM5708 Gigabit OS: Ubuntu 14.04, Kernel: 3.13.0-61-generic (x86_64), Compiler: GCC 4.8.4, File-System: ext4, Screen Resolution: 1024x768 8192KB seq read: Processor: 2 x Intel Xeon X5450 @ 2.99GHz (8 Cores), Motherboard: Dell 0H603H, Chipset: Intel 5000X MCH, Memory: 16384MB, Disk: 146GB PERC 6/i + 15 x 1000GB PERC 5/E, Graphics: AMD ES1000 128MB, Network: Broadcom NetXtreme II BCM5708 Gigabit OS: Ubuntu 14.04, Kernel: 3.13.0-61-generic (x86_64), Compiler: GCC 4.8.4, File-System: ext4, Screen Resolution: 1024x768 131072KB seq read: Processor: 2 x Intel Xeon X5450 @ 2.99GHz (8 Cores), Motherboard: Dell 0H603H, Chipset: Intel 5000X MCH, Memory: 16384MB, Disk: 146GB PERC 6/i + 15 x 1000GB PERC 5/E, Graphics: AMD ES1000 128MB, Network: Broadcom NetXtreme II BCM5708 Gigabit OS: Ubuntu 14.04, Kernel: 3.13.0-61-generic (x86_64), Compiler: GCC 4.8.4, File-System: ext4, Screen Resolution: 1024x768 Flexible IO Tester 2.1.13 Type: Sequential Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory - Result: MB/s MB/s > Higher Is Better 4KB seq read . 28.83 |========================================================= Flexible IO Tester 2.1.13 Type: Sequential Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Default Test Directory - Result: MB/s MB/s > Higher Is Better 64KB seq read . 81.31 |======================================================== Flexible IO Tester 2.1.13 Type: Sequential Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory - Result: MB/s MB/s > Higher Is Better 1024KB seq read . 84.29 |====================================================== Flexible IO Tester 2.1.13 Type: Sequential Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 8MB - Disk Target: Default Test Directory - Result: MB/s MB/s > Higher Is Better 8192KB seq read . 103.93 |===================================================== Flexible IO Tester 2.1.13 Type: Sequential Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 128MB - Disk Target: Default Test Directory - Result: MB/s MB/s > Higher Is Better 131072KB seq read . 128.34 |===================================================