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iPod Classic 80gb won't sync past certain limit and freezes computer.

85070 Views 109 Replies Latest reply: Jan 19, 2014 7:41 AM by turingtest2 RSS
  • turingtest2 Level 8 Level 8 (43,940 points)

    Realocs is reasonable, but the pending sectors need to be cleared somehow. If there is critical data there that cannot be read then the device will freeze every time. I know you say you've tried everything, but did you attempt the DFU restore or a format? It can sometimes take more than one attempt to clear up all the problems. Asking a friend to restore on their machine is another line of attack.


    You left out temperatures. It is worth noting that the operating range is 0-50c, exceeding those limits can damage the iPod.



  • kubajz896 Level 1 Level 1 (0 points)

    Thanks for quick reply. Hope you will be my saviour.

    Temperatures are 5-45 °C.

    So I need to get rid of that pending sectors? So DFU restores and formats over and over again until I get 0 pending sectors? And if after some time they'll appear again? Disc is dying or is it normal?

    You know I'm quite happy that I have there now about that 15gb, I can travel by mass transportation for a while and now format it again. OK, I'll try...

    PS: I forgot to mention that only thing which was a little help was restoring in Windows format. It helped me to get there 15gb, in Macintosh format I couldn't, just various from 5-7gb.

  • turingtest2 Level 8 Level 8 (43,940 points)

    If the restore/format does what it is supposed to do the numbers should change from


    Realocs: 601

    Pending sectors: 3




    Realocs: 604

    Pending sectors: 0


    Of course there may still be other bad areas of the disk yet to be discovered. The iPod's firmware doesn't perform any post-write validation. It is assumed all data is written properly and any issue only comes to light when the data is read back again. If a problem sector is part of the audio data for a song then, after a few attempts to re-read the data, the iPod will skip to the next track. If the data that cannot be read is part of the database, or a folder, or perhaps the artwork cache, then the consequences are likely to be more severe. Updating an iPod requires many updates to the database on the device as tracks are added to it. Any problem reading back this data is likely to cause the whole sync process to fail, leaving the device in an inconsistent state.



  • kubajz896 Level 1 Level 1 (0 points)

    Still the same: 3 pending sectors and 601 realocs. I don't know what to do. Erased it in disc mode, normal mode, DFU restore many times (every time after erasing). I even tried to erase it securely but it couldn't finish the process.

  • turingtest2 Level 8 Level 8 (43,940 points)
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