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SDcard in Gentoo or Windows wont save writes.
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njcwotx
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Joined: 25 Feb 2005
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PostPosted: Thu Feb 21, 2013 11:51 pm    Post subject: SDcard in Gentoo or Windows wont save writes. Reply with quote

I have an sd flash card. when I insert it into gentoo, I see /dev/mmcblk0p1, and when I mount it I see files.

If I reformat, write a file, or even "dd if=/dev/zero of=/dev/mmcblkp0", "dd if=/dev/zero of=/dev/mmcblk0p1", fdisk and create a linux partition and format, and so on..... I always get the original information.

The write protect tab is set to writable.

the same happens in Windows. we format it says format failed, we write a file to drive and it shows up and we can even open it. Eject it and reinsert and file is gone, looks just like original sdcard contents!
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Jaglover
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PostPosted: Fri Feb 22, 2013 12:24 am    Post subject: Reply with quote

The card expired perhaps?
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njcwotx
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PostPosted: Sat Feb 23, 2013 5:39 am    Post subject: Reply with quote

Anynway to read counters or confirm?


Its a relatuvely new card. Used in raspberry pi. Seconds card. Power outage, raspberry pi lost power, and now card is messed up.

I can understand file system corrupting, but we should have been able to reformat and reuse.
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