Only one SD Card insertion per session? [SOLVED]

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Intio
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Only one SD Card insertion per session? [SOLVED]

Post by Intio » Sat May 14, 2011 7:31 pm

Hi. Whenever I use an SD Card, and then remove it, I find that LMDE will not recognise any other SD card I insert. I always use the correct right-click 'Safely Remove this...' before removing the cards, but I suspect that it is somehow not unmounting correctly: and therefore not recognising any other card inserted.

This problem does not occcur with USB drives/sticks.

Is there a terminal command I can use to force the SD card reader to 'refresh' itself?
Last edited by Intio on Sat May 14, 2011 8:22 pm, edited 1 time in total.
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zombie
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Re: Only one SD Card insertion per session?

Post by zombie » Sat May 14, 2011 7:40 pm

I have the same problem. I have started using 'eject' when removing the card.
'Safely Remove' cuts the power to the card reader until next session.
As far as I know "eject" is just as safe, as it is finishing all reading/writing activity before unmounting.

Intio
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Re: Only one SD Card insertion per session?

Post by Intio » Sat May 14, 2011 8:22 pm

Hmm yes, that seems to be the issue. I suppose I'll use Eject from now on then. I wonder what purpose there is in cutting all activity on 'Safely Remove... ' ?
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Poisoned Dragon
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Re: Only one SD Card insertion per session? [SOLVED]

Post by Poisoned Dragon » Mon Dec 05, 2011 10:32 pm

Any usb storage device, connected to a computer, has to be "safely removed" to ensure that all data access, and caching, is finished. This prevents data corruption. This also kills the power to that usb device, until it is unplugged and reinserted. Since card readers appear as usb storage, the "safely remove" capability appears. When used, the power to the reader is cut. The only way to re-enable it, outside of a simple reboot, would be to open your case and unplug, and reattach, the reader from the motherboard hub.

So, that's why the "safely remove" option pops up, and why you shouldn't use it on card readers.

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