Surface Pro microSD card unmounts after waking up from sleep

Anonymous

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?

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Anonymous

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.

I right-clicked on the SD card device in device manager under Disk Drives.
Then clicked properties
Then went to the policies tab
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

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

Simply change the driver to generic USB mass storage.

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78 additional answers

Anonymous

2014-09-27T05:10:20+00:00

I had been having the same problem too and was getting quite irritated, so I tried one of the tricks I use with my phone and so far it worked. I do not believe this is Software issue. After investigating, it just seemed like the card was maybe not getting 100% connection to the Surface 100% of the time. A trick I used on my phones SIM card to solve this problem was putting a piece of tape on the printed/non-contacts side and cut it to just add a small amount of thickness to the card. I did this to my micro SD card and it has not disconnected for a week. I know it seems unorthodox, but it worked for me, and it could work for you. Good luck everyone!

-Aleks
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Anonymous

2015-02-24T21:39:12+00:00

By way of an update, it has been 5 months since MS replaced my Surface Pro 2, and even though I am using the same SANDisk 128GB MicroSD card (along with occasional use of others), it has not unmounted on me even once. I have a high degree of confidence my problem was specific to a hardware issue with the MicroSD reader, or some other hardware related issue. Refreshing the install did nothing to help, replacing the hardware cleared it up 100%.

i have noticed that when it wakes up the MicroSD icon takes a moment to appear, but it has yet to fail to unmount on the replacement unit (or fail to automatically remount after bring asleep, whichever is the technically correct way to look at it.)

”MicroSD icon takes a moment to appear“ means "unmount and mount" that is remount. So, your issue persists only being alleviated.
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