SD card Read/Write speed fix (5Mbps to 15Mbps)

[Karl]

WARNING: I do not know if all Android ROMs make use of /system/etc/init.d scripts, so this may not work for you. Use at your own risk!

ROOTED STOCK ROM USERS: Unfortunately, it seems that you folks will not be able to make use of this tweak, since it seems that the stock ROM does not utilize init.d. I do not have access to a phone running the stock ROM, so am not sure where in the boot process we can alternately insert a script to apply this tweak upon every bootup.


First, check to see if you even have an init.d folder.

adb shell ls /system/etc/init.d

Your output should look something like this:

c:\Incoming\Android>adb shell ls /system/etc/init.d
00banner 02firstboot 04apps2sd 99complete
01sysctl 03modules placeholder

If you get "ls: /system/etc/init: No such file or directory" as a result, then you don't have this folder and SHOULD NOT CONTINUE.

DOWNLOAD FLASHABLE ZIP HERE: Courtesy of akazabam @ AndroidForums

sdreadahead-signed.zip

Boot into recovery, flash, reboot.

After rebooting, run the following to double-check everything worked properly.

adb shell cat /sys/devices/virtual/bdi/179:0/read_ahead_kb

If it says 128, you're done! I hope this helps some of you out!



Also this speeds up the phone considerably especially if you are using APPS2SD...

xda-developers - View Single Post - SD card speed fix (5Mbps to 15Mbps)

http://forum.xda-developers.com/showthread.php?t=921530

Sd Card Read/Write Tester .apk attached

[PropagandaX]

Thanks. I saw this at XDA, just checked my read_ahead_kb and it says 4, lame. I'll give this a try.

Edit:

I have a class 2 card sdhc installed.

Pre test results: write speed 3mb/s, read 4mb. class 2 confirmed

Post test results: write speed 4mb/s, read 10mb!! Now it says i have a class 4 lol.
Sweet!

[mikewest]

Originally Posted by KarlE

WARNING: I do not know if all Android ROMs make use of /system/etc/init.d scripts, so this may not work for you. Use at your own risk!

ROOTED STOCK ROM USERS: Unfortunately, it seems that you folks will not be able to make use of this tweak, since it seems that the stock ROM does not utilize init.d. I do not have access to a phone running the stock ROM, so am not sure where in the boot process we can alternately insert a script to apply this tweak upon every bootup.


First, check to see if you even have an init.d folder.

adb shell ls /system/etc/init.d

Your output should look something like this:

c:\Incoming\Android>adb shell ls /system/etc/init.d
00banner 02firstboot 04apps2sd 99complete
01sysctl 03modules placeholder

If you get "ls: /system/etc/init: No such file or directory" as a result, then you don't have this folder and SHOULD NOT CONTINUE.

DOWNLOAD FLASHABLE ZIP HERE: Courtesy of akazabam @ AndroidForums

sdreadahead-signed.zip

Boot into recovery, flash, reboot.

After rebooting, run the following to double-check everything worked properly.

adb shell cat /sys/devices/virtual/bdi/179:0/read_ahead_kb

If it says 128, you're done! I hope this helps some of you out!



Also this speeds up the phone considerably especially if you are using APPS2SD...

xda-developers - View Single Post - SD card speed fix (5Mbps to 15Mbps)



SD card speed fix (5Mbps to 15Mbps) - xda-developers



Sd Card Read/Write Tester .apk attached

I used this and now it says I have a class 2 card (My card is class 4). It now also shows a write speed of 2 and read speed of 4. Before this update i had 5 write and 4 read....

is there anyway to uninstall this?

[Karl]

Originally Posted by mikewest

I used this and now it says I have a class 2 card (My card is class 4). It now also shows a write speed of 2 and read speed of 4. Before this update i had 5 write and 4 read....

is there anyway to uninstall this?

did you run the test before install?

and the is no one to install
you always back before testing a mod

[PropagandaX]

Originally Posted by mikewest

I used this and now it says I have a class 2 card (My card is class 4). It now also shows a write speed of 2 and read speed of 4. Before this update i had 5 write and 4 read....

is there anyway to uninstall this?

Mine said it was a class two on first test but then said class 4 after the mod. I have a class 2 card. Either way it worked for my on Fresh Evo rom.

[Sunsparc]

I have a 16GB Class 10, so I'm good.

Nice post though.

[Karl]

Originally Posted by Sunsparc

I have a 16GB Class 10, so I'm good.

Nice post though.

are you getting class 10 speeds

[mikee4fun]

I have a Kingston 16GB class 10 and it bumped my write speeds from 2MB to 4MB and my read speed went from 8MB to 16GB

If you want a flash able zip, attached is Calklin's zip. This should work on any rom. You should always do a nandroid backup before flashing any zips. Otherwise you are toast if something doesn't work out for you. Mikewest if you don't have a nandroid backup your going to have to wipe and re setup your EVO.

Also Karlie I would suggest you post the source since all you did was copy and paste others work from XDA. XDA member Beknatok posted what the you copied. Source: http://forum.xda-developers.com/show...6&postcount=47

[Karl]

Originally Posted by mikee4fun

I have a Kingston 16GB class 10 and it bumped my write speeds from 2MB to 4MB and my read speed went from 8MB to 16GB

If you want a flash able zip, attached is Calklin's zip. This should work on any rom. You should always do a nandroid backup before flashing any zips. Otherwise you are toast if something doesn't work out for you. Mikewest if you don't have a nandroid backup your going to have to wipe and re setup your EVO.

Also Karlie I would suggest you post the source since all you did was copy and paste others work from XDA. XDA member Beknatok posted what the you copied. Source: xda-developers - View Single Post - SD card speed fix (5Mbps to 15Mbps)

the source thread is there
along with the post in the thread i find the .zip file

[lkillen]

I have the Init directory. I unmounted and copied it to my card and then installed the spearhead. It actually slowed my card access significantly. I restored and all it normal.