Swap EMMC and SDCARD? could that fix the IO issues? - Asus Eee Pad Transformer Prime

Hey guys, got something for discussion here....
I remember back when i had my I9000 there was a problem with the first few batches of firmwares, basically it was killing the internal memory cards. To bypass this the community swapped the sdcard and emmc. As an added bonus you could now get much faster IO because you could use a class 10 memory card instead of the class 2 cards they were putting in the phones....
I wonder if we couldnt do the same thing here? Instead of loading everything on the internal memory why not use the microSD cardslot, throw a memory card in there, and reassign everything to work from that? IO could be a lot faster if we use a quality card...
What do ya think? Possible or not?

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Funny, I was actually thinking the same thing last night.
I have a handheld android gaming device, and when I install games on it, it gives me the option to transfer the game to SD card.
In this case it's more so to save internal storage space, but it made me wonder if we could install programs/games to external storage. If nothing else, we could compare boot times of various apps (stored internal vs external) and see if there's a difference.
If it's an IO contention issue due to scheduling it probably won't help, but it'd be worth checking out.
So... is there an app that lets us transfer installed programs the external storage? (I think you meant a ROM which would do it, but this might work as a proof of concept until then.)
pileot said:
Hey guys, got something for discussion here....
I remember back when i had my I9000 there was a problem with the first few batches of firmwares, basically it was killing the internal memory cards. To bypass this the community swapped the sdcard and emmc. As an added bonus you could now get much faster IO because you could use a class 10 memory card instead of the class 2 cards they were putting in the phones....
I wonder if we couldnt do the same thing here? Instead of loading everything on the internal memory why not use the microSD cardslot, throw a memory card in there, and reassign everything to work from that? IO could be a lot faster if we use a quality card...
What do ya think? Possible or not?
Click to expand...
Click to collapse

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a class10 sdcard delivers 10MB/s, which is quite low, in general lower than the internal memory.
besides that the 10 MB is probably measured when reading and writing large files which is faster than small files (which you will be doing when running android from it)
Antutu shows 5-6 MB/s write speed in my case but i dont think it will be better on external memory
i have yet to find a benchmark tool that can test both the internal and the external sdcard on android ... someone knows such a tool?

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Tempie007 said:
a class10 sdcard delivers 10MB/s, which is quite low, in general lower than the internal memory.
besides that the 10 MB is probably measured when reading and writing large files which is faster than small files (which you will be doing when running android from it)
Antutu shows 5-6 MB/s write speed in my case but i dont think it will be better on external memory
i have yet to find a benchmark tool that can test both the internal and the external sdcard on android ... someone knows such a tool?
Click to expand...
Click to collapse
Have no idea if theses are any good, i just googled, but they claim to measure read/write speeds both internal and external
https://play.google.com/store/apps/details?id=com.passmark.pt_mobile&hl=en
https://play.google.com/store/apps/details?id=com.sprint.performance&hl=en

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what about this?
http://www.theregister.co.uk/2012/04/05/samsung_uhs_1_microsd/
80MB/s
that would be faster

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banderos101 said:
Have no idea if theses are any good, i just googled, but they claim to measure read/write speeds both internal and external
https://play.google.com/store/apps/details?id=com.passmark.pt_mobile&hl=en
https://play.google.com/store/apps/details?id=com.sprint.performance&hl=en
Click to expand...
Click to collapse
Testing the device performance one:
W is write, R is read
200mb, 5 iterations
* TF201:
-Internal:
MaxW: 15
MeanW: 12
MinW: 10
MaxR: 26
MeanR: 23,5
MinR: 18,5
-Removable:
MaxW: 15
MeanW: 12,2
MinW: 9,9
MaxR: 27
MeanR: 18
MinR: 9
* SGS3:
-Internal:
MaxW: 33
MeanW: 26
MinW: 23
MaxR: 45
MeanR: 40
MinR: 34
-Removable:
MaxW: 31
MeanW: 20
MinW: 9,9
MaxR: 44
MeanR: 30
MinR: 9,6
So yeah... not sure what to think of it. Will test some more when I have some time.

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dagrim1 said:
Testing the device performance one:
W is write, R is read
200mb, 5 iterations
* TF201:
-Internal:
MaxW: 15
MeanW: 12
MinW: 10
MaxR: 26
MeanR: 23,5
MinR: 18,5
-Removable:
MaxW: 15
MeanW: 12,2
MinW: 9,9
MaxR: 27
MeanR: 18
MinR: 9
* SGS3:
-Internal:
MaxW: 33
MeanW: 26
MinW: 23
MaxR: 45
MeanR: 40
MinR: 34
-Removable:
MaxW: 31
MeanW: 20
MinW: 9,9
MaxR: 44
MeanR: 30
MinR: 9,6
So yeah... not sure what to think of it. Will test some more when I have some time.
Click to expand...
Click to collapse
Which one did you use?

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Originally Posted by banderos101
Have no idea if theses are any good, i just googled, but they claim to measure read/write speeds both internal and external
https://play.google.com/store/apps/details?id=com.passmark.pt_mobile&hl=en
https://play.google.com/store/apps/details?id=com.sprint.performance&hl=en
Click to expand...
Click to collapse
Testing the device performance one:
W is write, R is read
200mb, 5 iterations
* TF201:
-Internal:
MaxW: 15
MeanW: 12
MinW: 10
MaxR: 26
MeanR: 23,5
MinR: 18,5
-Removable:
MaxW: 15
MeanW: 12,2
MinW: 9,9
MaxR: 27
MeanR: 18
MinR: 9
* SGS3:
-Internal:
MaxW: 33
MeanW: 26
MinW: 23
MaxR: 45
MeanR: 40
MinR: 34
-Removable:
MaxW: 31
MeanW: 20
MinW: 9,9
MaxR: 44
MeanR: 30
MinR: 9,6
So yeah... not sure what to think of it. Will test some more when I have some time.
Click to expand...
Click to collapse
The passmark one is quite useless, really inconsistent results (300 MB\s on my internal memory, and 5s later its 30 MB\s)
For the device information app:
My internal speed gives aprox the same results as you.
However for External SD Card speed you'll need to add a custom location /Removable/MicroSD, for me it results as expected: aprox 10 MB\s for MicroSD class10 so bench looks fairly realistic.
All in all the SGS3 pwns the prime big time.
Also inreal world; installing a random app on SGS3 takes like 1-2 seconds, on Prime it would take 6-8 or something and it completely locks up.. the difference is so huge!!
But regarding these bench results: this difference does not explain the use real world difference.
I think this bench writes large files of data at a time, where as the SQLLite writes little portions of data (inserts), same what happens while browsing and installing apps (a bit bigger but still relatively small.)
I think this is the Prime's problem; whatever the cause may be.
Gonna try to find some tool for seeing whats going on in the background... want to see the queueing etc.. but unfortunally this aint windows lol
Edit; here someone asks the same.. http://forum.xda-developers.com/showthread.php?t=1611888
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