ext4ac100 ARMv7 rev 0 testing on Ubuntu 12.04 via the Phoronix Test Suite. ext4ac100: Processor: ARMv7 rev 0 @ 1.00GHz (2 Cores), Motherboard: Toshiba AC100 / Dynabook AZ, Memory: 435MB, Disk: 8GB SEM08G OS: Ubuntu 12.04, Kernel: 3.0.8-4-ac100 (armv7l), Desktop: Unity 2D 5.0.0, Display Server: X Server 1.10.4, Compiler: GCC 4.6, File-System: ext2/ext3, Screen Resolution: 1024x600 btrfslzoac100: Processor: ARMv7 rev 0 @ 1.00GHz (2 Cores), Motherboard: Toshiba AC100 / Dynabook AZ, Memory: 435MB, Disk: 8GB SEM08G OS: Ubuntu 12.04, Kernel: 3.0.8-4-ac100 (armv7l), Desktop: Unity 2D, Display Server: X Server 1.10.4, Compiler: GCC 4.6, File-System: btrfs, Screen Resolution: 1024x600 nilfs2ac100: Processor: ARMv7 rev 0 @ 1.00GHz (2 Cores), Motherboard: Toshiba AC100 / Dynabook AZ, Memory: 498MB, Disk: 32GB MMC32G OS: Debian Linux Wheezy/sid, Kernel: 3.0.8 (armv7l), Display Server: X Server 1.11.3.901 (1.11.4 RC 1), Compiler: GCC 4.6, File-System: nilfs, Screen Resolution: 1024x600 IOzone 3.347 Record Size: 4Kb - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better ext4ac100 ..... 8.47 |========================== btrfslzoac100 . 17.93 |======================================================== nilfs2ac100 ... 5.87 |================== IOzone 3.347 Record Size: 4Kb - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better ext4ac100 ..... 14.92 |================================== btrfslzoac100 . 24.68 |======================================================== nilfs2ac100 ... 12.51 |============================ IOzone 3.347 Record Size: 64Kb - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better ext4ac100 ..... 8.60 |================ btrfslzoac100 . 29.73 |======================================================== nilfs2ac100 ... 5.65 |=========== IOzone 3.347 Record Size: 64Kb - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better ext4ac100 ..... 14.54 |========= btrfslzoac100 . 94.91 |======================================================== nilfs2ac100 ... 13.22 |======== hdparm Timed Disk Reads Disk To Read: /dev/mmcblk0p12 MB/s > Higher Is Better ext4ac100 ..... 13.39 |======================================================== btrfslzoac100 . 13.47 |======================================================== Unpacking The Linux Kernel linux-2.6.32.tar.bz2 Seconds < Lower Is Better ext4ac100 ..... 215.32 |======================================================= btrfslzoac100 . 139.98 |==================================== nilfs2ac100 ... 170.12 |===========================================