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
    2015-02-24T22:37:18+00:00

    I would disagree, actually.  The MicroSD is of course being powered down, as it goes to sleep along with the Surface. The MicroSD card will inherently be asleep while the Surface is powered down.

    The problem has never been that the MicroSD card powers when the Surface powers down, as that is expected behavior.  The problem is that if the MicroSD card doesn't have a connection to the MicroSD card slot that is within spec, it will not power back up in time for the Surface to register it as still being present.

    Please see http://answers.microsoft.com/en-us/surface/forum/surfpro-surfusingpro/surface-pro-microsd-card-unmounts-after-waking-up/4b3a1fe4-ab4e-4c4a-b894-fe82134c39a3?page=6&msgId=63e6b391-948e-43ad-97e4-05a55b527d73 for additional instances where an improper physical connection is being born out.

    Incidentally, I have since replaced my Surface Pro 2 with a Surface Pro 3, using the same card that originally given me trouble on the first Surface Pro 2, and its behavior has been flawless.  This again tells me that the problem is not software related, but was specific to the card reader on the original Surface Pro 2 I had these issues with.

    -Ted

    Your link is wrong. It point to this thread - the current thread! You have copied from the wrong address bar...

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  2. Anonymous
    2015-02-24T22:42:23+00:00

    Have you tried placing a small piece of tape or two on the backside of the MicroSD card in order to fatten it up and increase the tension against the contacts? There have been multiple people who have reported success by doing so, where the card no longer unmounts on them after waking.

    -Ted

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