Surface Pro microSD card unmounts after waking up from sleep

Anonymous
2013-03-01T00:26:48+00:00

Hi,

I've recently bought Surface Pro along with a 64 GB sd card. I've noticed that after a long sleep period, the SD card unmounts itself and I can no longer find it under explorer. I need to remove and reinsert it before Windows detects the card again. This doesn't happen if I wake up the device shortly after putting it to sleep, only after a few hours. I wouldn't mind it as much if I didn't have to set up Skydrive again after reinserting. I think it might have something to do with s3 sleep, and might be a driver/software error, but I'm not entirely sure. Any ideas?

Surface | Surface Pro | Install and update

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Anonymous
2014-07-22T16:48:29+00:00

I finally solved this problem by enabled write-caching for the SD card.  My card no longer unmounts unexpectedly when changing power modes.  I realize this comes with some risk of possible data loss if the card is not ejected properly.

  1. I right-clicked on the SD card device in device manager under Disk Drives.
  2. Then clicked properties
  3. Then went to the policies tab
  4. And then selected "best performance"

So far, no unexpected dismounts and no data corruption.  This has also improved the performance of the device as reads and writes of large files seem to be much smoother now.

My theory is that this setting is preventing the slot from powering down while in a hibernated or suspended state.

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Anonymous
2014-02-06T04:56:51+00:00

Hello Ted

Check out my other post here

http://answers.microsoft.com/en-us/surface/forum/surfpro2-surfdevice/micro-sd-slot-no-longer-recognized-in-the-surface/2705d99f-440a-41a4-9bdf-965f1b092efd

Eventually I changed the card same make/ model, formatted it as NTFS and so far have had no issues at all...........and its been almost 2 months now.

I think Scandisk have issues with quality control ?

Try a full format on NTFS , it does take sometime

If it still has issues after that I would use the card in your phone or something else and by another one brand new for the slate.

It worked for me.

I guess we will get the same issues when the 128GB MSD card comes out!

Good luck

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Anonymous
2015-07-17T20:46:00+00:00

Simply change the driver to generic USB mass storage.

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  1. Anonymous
    2013-03-12T08:29:02+00:00

    I didn't think that would be possible either, but here I am, seeing only the mounted VHD, and not the physical microSD card drive the VHD file is located on. Odd, eh?

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  2. Anonymous
    2013-03-12T01:47:33+00:00

    That's really weird, I can't even imagine how the card itself could dismount while the virtual disk on the card was still functional... but glad the link helped.

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