1. MrGoodSmith's Avatar
    Is there any technical documentation somewhere that explains what partition stitching does to the phone when installing Windows 10?

    This sounds like an irreversible process, and I would like to know more about it if possible, and how it may effect reverting back to WP8.1 in the future if needed.
    04-10-2015 09:03 AM
  2. sportex's Avatar
    talking about "partition stitching", when is the TP ready for the 930? tonight, next month?, next year?
    04-10-2015 09:08 AM
  3. xandros9's Avatar
    talking about "partition stitching", when is the TP ready for the 930? tonight, next month?, next year?
    whenever they squish that display scaling bug etc.

    We don't have any ETA. Software development doesn't always fit into nice clean timetables.

    I could be wrong, but I know some phones have partitions for the system files and stuff that is fixed in size. Maybe on some devices it needs to be able to be adjusted more easily so as to make things more reliable.
    04-10-2015 04:03 PM
  4. realwarder's Avatar
    Is there any technical documentation somewhere that explains what partition stitching does to the phone when installing Windows 10?

    This sounds like an irreversible process, and I would like to know more about it if possible, and how it may effect reverting back to WP8.1 in the future if needed.
    Pretty sure the Lumia Recovery Tool basically wipes entire phone flash and puts a clean image on the phone with partitions in the image. So should be no issues rolling back.

    As the update is supplied OTA however, the partition assigned for the OS system files needs to be big enough to hold the OS. It sounds as if historically this was not the case and different carriers or OS versions started with different base partition sizes. There are a lot of partitions.

    I assume that stitching joins several of these together to gain space for the install or download. Someone inside Microsoft knows details, we don't.

    Reflashing will definitely restore a clean set of partitions though..
    04-10-2015 07:21 PM
  5. MrGoodSmith's Avatar
    Reflashing will definitely restore a clean set of partitions though..
    This is what I'm actually not sure about. Is the OS partition they refer to the same as the ROM area? When you do a hard reset to your phone without connecting it to a computer, the phone uses an image on the ROM to reinstall everything fresh. If WP10 increases my ROM size (assuming its what they stitch), then if I decide to roll back to WP8, that partition would be wasting extra unused space that I could have used for my own files.

    I'm only guessing here. I'll have to pull out my backup Lumia 520 and do some experimentation on it, moving between WP10 and WP8 to see what happens.
    04-10-2015 08:06 PM
  6. realwarder's Avatar
    A hard reset is different to using the recovery tool.

    Hard reset likely won't undo everything, however we don't know that.

    Using the recovery tool as I said will.
    04-11-2015 06:45 AM
  7. MrGoodSmith's Avatar
    Hard reset will read from the the recovery partition or area on your phone to reinstall whatever system you currently have. The recovery tool will replace the recovery area with a new system then install it on your phone, which could be an older system.
    04-11-2015 10:44 AM
  8. MrGoodSmith's Avatar
    So after I installed WP10 TP I rolled back to WP8.1 using Nokia Care Suite, and didn't notice any change in my used and available storage space. I used a Rogers Lumia 520.
    Still not sure what partition stitching does or where it applies.
    04-16-2015 10:16 AM

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