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Old November 27th, 2012, 10:22 PM   #1 (permalink)
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Notsure MicroSD in Mass Storage Mode gets disconnected during data transfer

Hi,

I have a 32GB MicroSD in my My Razr M/XT 907. The phone is connected to my Windows XP (SP3) laptop. The MicroSD is formatted with FAT32 and is recognized by the laptop. The MicroSD contains 15 large files (~2GB in size).

I am running an application on the laptop that reads heavily from several large files on the microsd for about 10 minutes with a random access pattern. Then the application writes to the large files on the microsd for about 3 minutes with a random access pattern. Once the large files on the microsd have been updated the application starts all over again with the read cycle.

Problem is that after a few cycles the MicroSD gets disconnected. Windows explorer shows an empty drive and a message appears indicating that the drive has been disconnected. After reconnecting the device all files are again visible from the laptop.

So far I have tried the following:

1. Tried different cables, one of them as short as 13'' -> no effect

2. Connected the microsd card (Samsung, class 10 32GB) through a card reader -> problem did not appear

3. Tried a different microsd (Lexar, class 10 32GB) -> same issue

4. Tried the Lexar microsd with a card reader that is directly attached -> problem did not appear

5. Tried a different phone (Motorola Atrix, MB860) -> same problem

Could this be a thermal issue where the MicroSD overheats and gets 'shut down' by Android? Any other idea?

Thank you

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Motorola DROID RAZR M
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The Motorola DROID RAZR M comes as the mid-end smartphone among the new RAZR family. A lower price usually means sacrificing a great deal of features, but Motorola managed to make a very capable device with a $99 price-tag. The device features the ... Read More

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