mic_888 · Apr 4, 2011 at 06:00 am

Increase The Reading Speed Of Your SD Card

SD card reading speeds vary depending upon which class of SD card that you have chosen.  However, many have experienced disappointment when comparing the read speed on our PCs to that on our Android devices. XDA forum member brainmaster states that it doesn’t matter if you have a fast 10 Class SD Card – it’s all in the Cache.

The Cache size for reading from SD card on your Android device is set to 128KB, on some ROMs even to 4KB!

To check for yourself you will need to navigate to /sys/devices/virtual/bdi/179:0/read_ahead_kb. This can be changed manually but will not persisit on reboot. In order to make the change persist, it needs to be done by loading the script on startup through the init.d. Alternatively, the XDA member has provided the CWM.zip files to make thing easier.

To find out the best Cache size for your SD card and the best method to change this for you, head on over to the modification thread.


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mic_888

mic_888 is an editor on XDA-Developers, the largest community for Android users. I've been around XDA since 2007 when I bought the HTC Touch, well things have moved on a lot since then, and I've tried my hand at developing for WM and Android (still learning), but wanted to contribute more by becoming a News Writer for XDA. I write mainly Android articles, and some Windows Mobile. We're always sifting through the masses of threads for front page news, but do let me or the other guys know if you think anything is newsworthy including any breaking news! View mic_888's posts and articles here.
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