StorageSpeed

From Openmoko

(Difference between revisions)
Jump to: navigation, search
(catchg)
 
(5 intermediate revisions by 2 users not shown)
Line 4: Line 4:
  
 
  root@moko ~ $ hdparm -tT /dev/mmcblk0p2
 
  root@moko ~ $ hdparm -tT /dev/mmcblk0p2
 
+
 
  /dev/mmcblk0p2:
 
  /dev/mmcblk0p2:
 
   Timing cached reads:    46 MB in  2.05 seconds =  22.45 MB/sec
 
   Timing cached reads:    46 MB in  2.05 seconds =  22.45 MB/sec
Line 10: Line 10:
 
   Timing buffered disk reads:    4 MB in  4.54 seconds = 902.06 kB/sec
 
   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
 
  HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device
root@moko ~ $ hdparm -tT /dev/mtdblock6
 
  
 
NAND:
 
NAND:
  
 +
root@moko ~ $ hdparm -tT /dev/mtdblock6
 +
 
  /dev/mtdblock6:
 
  /dev/mtdblock6:
 
   Timing cached reads:    50 MB in  2.06 seconds =  24.26 MB/sec
 
   Timing cached reads:    50 MB in  2.06 seconds =  24.26 MB/sec
Line 21: Line 22:
  
 
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. Wifi and GSM were enabled, and the device was hooked up to my desktop computer using USB. GPS was disabled, as was GPRS.
 
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. Wifi and GSM were enabled, and the device was hooked up to my desktop computer using USB. GPS was disabled, as was GPRS.
 +
 +
[[Category:Flash]]

Latest revision as of 08:54, 19 July 2009

Here is the result of a little speed test I (sybren) performed on the NAND and my 2 GB micro-SD card:

SD (Transcend 2GB uSD card):

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

NAND:

root@moko ~ $ hdparm -tT /dev/mtdblock6

/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. Wifi and GSM were enabled, and the device was hooked up to my desktop computer using USB. GPS was disabled, as was GPRS.

Personal tools

Here is the result of a little speed test I (sybren) performed on the NAND and my 2 GB micro-SD card:

SD (Transcend 2GB uSD card):

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. Wifi and GSM were enabled, and the device was hooked up to my desktop computer using USB. GPS was disabled, as was GPRS.