12 Replies Latest reply on Jun 1, 2012 8:13 AM by patgolfneb

    Nook Color keeps corrupting SD card

      My NC keeps corrupting my SD card. If the NC goes to sleep while it is attached to the PC, or if the cable is unplugged before ejecting the media manually, the card becomes corrupt and will no longer be read by the NC. Usually it is perfectly fine in the PC, and a checkdisk finds no errors. Sometimes it's pretty wack and I have to reformat the card.

       

      Why does the NC keep corrupting SD cards? It's not just this one card either, I've tried several.

       

      Charles.

        • Re: Nook Color keeps corrupting SD card
          Bluepen61

          Pardon me if I am reading too much into your problem, but the memory card should only be formated by the NookColor, not on or by any other device. Do not defrag or maintain the card using any other software or Windows tools (even if connecting to your pc/laptop reports errors, just ignore the error statements).

          • Re: Nook Color keeps corrupting SD card

            ChopperCharles wrote:

            My NC keeps corrupting my SD card. If the NC goes to sleep while it is attached to the PC, or if the cable is unplugged before ejecting the media manually, the card becomes corrupt and will no longer be read by the NC. Usually it is perfectly fine in the PC, and a checkdisk finds no errors. Sometimes it's pretty wack and I have to reformat the card.


            Dismount the SD card from the PC before letting it go to sleep or unplugging it.  This operates just like any other thumb drive, which is what the PC thinks it is.

              • Re: Nook Color keeps corrupting SD card

                If that were true I could just unplug it and go, I wouldn't have to right-click on the drive and select "eject" first. 

                 

                Last night my memory card was working fine, I plugged it into the PC to transfer some video files over, and something happened where it mounted and then immediately dismounted and mounted again. Nothing I did. Well, I transferred my video file over (to the SD card), properly ejected both the nook color and the sd card drive, and when the NC came back up it said the sd card was corrupt and needed to be formatted.

                 

                I removed te card from the nook, plugged it into a usb micro sd card reader, and looked at it on my laptop. The music directory was corrupt, all the folders were named with random gibberish - although most of the files were still there and named correctly. My music videos were still there, but the big movies I had copied over a few weeks back were gone. 

                 

                Checking the disk for errors through Windows 7 did nothing, but when I ran "chkdsk h:" from a command prompt it found lots of errors... but choked on some unrecoverable ones. So I copied off as many files as I could, and I kept getting "this file no longer exists at this location" and other file system errors. Got what I could and formatted the card.

                 

                This is not the first time this exact scenerio has played out. 

                 

                Charles.

                  • Re: Nook Color keeps corrupting SD card
                    GDJ

                    I have had my NC dismount itself unexpectedly from PC several times.  However, it never resulted in corruption of the card.  I've never had that happen at all (I'm using Windows XP)

                     

                    Are you getting any issues with the Nook's internal memory?  If so, that may be indicative of a problem with your PC.

                     

                    If you improperly eject your card when it is in the card reader rather than the NC, what happens?

                     

                    The obvious workaround would be to manage the card with it plugged into a card reader instead of connecting the NC.

                     

                    Or you may have something defective with the Nook's card reader.

                    • Re: Nook Color keeps corrupting SD card
                      geertm

                      ChopperCharles wrote:

                      If that were true I could just unplug it and go, I wouldn't have to right-click on the drive and select "eject" first. 


                      Even with a regular thumb drive it is a good idea to eject it first before removing it from the PC.

                      • Re: Nook Color keeps corrupting SD card
                        GDJ

                        You say you have used different cards and are still having issues.  Are the cards all of the same brand and class?  Some types of cards seem to work better with the NC than others, at least that is what I have gathered from my reading.

                          • Re: Nook Color keeps corrupting SD card
                            Bluepen61

                            The memory card should only be formated using the NookColor. Do not use any other device. You do so by going to Settings, Device Info, SD Card, and first select Unmount SD Card, then once the card is unmounted (not physically removed from the NC), select Format SD Card.


                            Do not defrag or maintain the card (other than side-loading files or moving files) using any other software or Windows tools (even if connecting to your pc/laptop, Windows or other software reports errors, just ignore the error statements).

                              • Re: Nook Color keeps corrupting SD card

                                I don't defrag it, I don't do anything else with it. It just randomly corrupted again today when I properly ejected it from my PC.

                                 

                                And for the record, no other memory card or device I've ever used has needed me to eject it first, or risk corrupting everything. That's just poor programming.

                                 

                                Charles.

                                  • Re: Nook Color keeps corrupting SD card
                                    DeanGibson

                                    ChopperCharles wrote:

                                    ...  And for the record, no other memory card or device I've ever used has needed me to eject it first, or risk corrupting everything. That's just poor programming.

                                     

                                    Charles.


                                    This requirement is almost universal in operating systems, in order to insure that a device is completely written to, before detachment.  Also, there is nothign wrong with formatting the device from the PC.

                                     

                                    However, the kinds of errors being described here point to a grossly defective device, that device being either the Nook or the SDcards.

                                     

                                    I don't think it is the Nook.  More likely it is the SDcards.

                                     

                                    Due to the large number of SDcards in the world, a lucrative criminal cottage industry has developed, selling memory devices that are counterfeits of genuine manufacturers, complete with labels that appear genuine.  Often they are relabeled devices of much smaller capacity, slightly modified to report the labeled size, so that they appear to work correctly initially, until a significant amount of data is transferred.

                                     

                                    So, the rules of thumb are:

                                     

                                    1. Buy only SanDisk or Lexar brands;  the others just don't have the reliability.
                                    2. Buy them only from reputable dealers (not from eBay), to avoid counterfeits.

                                    If you follow the above guidelines, you will get what you pay for.  If you don't, you will also get what you pay for.

                                      • Re: Nook Color keeps corrupting SD card

                                        DeanGibson wrote:

                                        ...

                                        So, the rules of thumb are:

                                         

                                        1. Buy only SanDisk or Lexar brands;  the others just don't have the reliability.
                                        2. Buy them only from reputable dealers (not from eBay), to avoid counterfeits.

                                        If you follow the above guidelines, you will get what you pay for.  If you don't, you will also get what you pay for.


                                        As much as I love and defend eBay, I must agree. Do not buy SD cards from eBay, especially if they're shipped by a Seller from across the Pacific! Luckily, local shops like WalMart and RadioShack often have them at fair prices and I find Amazon OK as well as long as you're buying from Amazon proper and not one of the Amazon Sellers.

                                        • Re: Nook Color keeps corrupting SD card
                                          compulsivereaderTX

                                          The manual instructions tell you to properly eject the sd card BEFORE ejecting the device itself, wait for the device to return to the normal screen or the computer to tell you it is safe to remove the device and then unplug it from the computer.

                                           

                                          It should be a standard procedure to eject a device first if the computer always pops up with a "it is now safe to remove your device" message afterwards. (I run Windows 7). I don't think that would come up if it didn't matter one way or the other. Just assuming as I HAVE had corruptions in the past, not always, but once was enough that I should have remembered to avoid the next one.

                              • Re: Nook Color keeps corrupting SD card
                                patgolfneb

                                Seriously Chopper, you have been given solid answers. Expecting proper performance based on how you belive things should work instead of following the OS instructions is what drives customer service employees nuts.