StorageSpeed
From Openmoko
Here is the result of a little speed test I (sybren) performed on the NAND and my 2 GB micro-SD card:
SD:
root@moko ~ $ hdparm -tT /dev/mmcblk0p2
/dev/mmcblk0p2: Timing cached reads: 46 MB in 2.05 seconds = 22.45 MB/sec HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device Timing buffered disk reads: 4 MB in 4.54 seconds = 902.06 kB/sec HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device root@moko ~ $ hdparm -tT /dev/mtdblock6
NAND:
/dev/mtdblock6: Timing cached reads: 50 MB in 2.06 seconds = 24.26 MB/sec HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device Timing buffered disk reads: 6 MB in 3.20 seconds = 1.88 MB/sec HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device
So it appears that the NAND (/dev/mtdblock6) is roughly twice as fast as the SD card. The test was run on a Neo Freerunner (hardware revision A6) using SHR Unstable, kernel 2.6.29-rc3