Solved deleted files come back on SD card, can't del

July 20, 2011 at 14:03:00
Specs: Windows XP, Intel Centino Duo
I'm using an SD card for e-pub, music, and some family photos on a micro cruiz reader but discovered that when I deleted the files on the reader, they reappeared when re-booted. I then tried to use my computer through a usb cord, and they seemed to delete, but again, returned on re-boot. I got mad and pulled the sd card (4gb micro SD) and inserted it into a reader/writer adapter in my lenovo and deleted the files again. Then ejected the card and re-inserted it, and they were back. More angry than before, I booted in linux, and deleted the files again. But, again, just pulling the sd card and re-inserting it, and they were back again. I even tried scanning the card for virus, deleting the files, re-scanning the 'apparently empty' card and pulling and re-inserting it to discover they were back again. I'm satisfied there is no virus. Attributes are all what you'd expect with nothing checked when looking at properties. Unlocker can not find any hooks and when used to delete the file, no joy, it's back again. I really don't want to re-format the card since it has some apps installed that might be hard to re-locate but I'm just about ready to take that step. Any idea what's up?

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#1
July 20, 2011 at 15:33:45
Is there some backup and restore app on the card or do you have one running on the computer?

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#2
July 20, 2011 at 19:04:13
No backup/restore function. It's partitioned at 2gb to linux format and has some android aps on the linix side, the other 2gb is fat32 and I find I can neither delete the partion, nor delete the files on either partition, including re-formatting... format failure. Not sure why, but I suspect the card has simply failed in some respect. Seems strange that it "looks" like you can delete the files, they look to be gone until you pull the card and put it back in the slot, then they are all back again. I've about given up on this and will probably replace the darned thing, but I really want to KNOW what is going on.

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#3
July 20, 2011 at 19:21:16
✔ Best Answer
All solid state media have a finite number of rewrites available before the device will fail. Have you been using the card a long time?

Also, be aware that FAT32 has a 4GB file size limit.


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#4
July 21, 2011 at 08:24:56
4gb formatted in fat32 and 4gb formatted in ext3 so no problem there. But what do you mean a limeted number of read/writes? is this a built in limitation or a device 'fault' (service life)? Seems pretty silly since most e-book readers have internal flash drives (usually micro sd chips like this one) and are constanly using them with every boot for data storage and retrieval....

However, I'm beginning to think that may be the problem. I can read from it all I want, but can't write to it, can't delete the files, can't reformat it, and it, even using gparted in linux often says success at removing the partition, then displays an unchanged partition when the process is complete. Does this mean the software seems to think it worked, but fails to complete the final write back as the last step? Grrrrrr, if so, I'm going to be stuck replacing the darned (being very polite here) chip every few months.


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#5
July 21, 2011 at 13:30:16
It is not necessarily a built in limit, but rather the nature of the media. Read the link below.

http://hubpages.com/hub/Advantage-a...


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