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can't upgrade JB ipad2 to 5.0.1: error 21

This is a discussion on can't upgrade JB ipad2 to 5.0.1: error 21 within the iPad Hacking forums, part of the Apple iPad Discussions category; Hi all, Each time I try to upgrade my JB iPad2 to 5.0.1 I get Error 21 while restoring as part of the upgrade. Can ...

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  1. 01-24-2012 11:43 AM #1
    leland [OP]
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    can't upgrade JB ipad2 to 5.0.1: error 21

    Hi all,

    Each time I try to upgrade my JB iPad2 to 5.0.1 I get Error 21 while restoring as part of the upgrade.

    Can anyone help?

    Thus far I've tried:
    -Rebooting/restarting/etc
    -Changing TinyUmbrella so that set Cydia hosts on exit is NOT set
    -Breaking my junction for the backup

    Can anyone help?
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  2. 01-24-2012 11:43 AM
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  3. 01-24-2012 12:57 PM #2
    Mickey330 
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    Take a look at this sticky: TUTORIAL - Failsafe method to restore the current version of IOS

    I've heard it works great in helping people to go to iOS 5.0.1 - even if you're not jail breaking.

    So, give it a try?

    Marilyn
    Black 64GB WiFi/4G iPad3 (iOS 5.1.1; jailbroken w/Absinthe 2.0) & black 64GB iPhone 4S (iOS 5.0.1; jailbroken w/Absinthe 1.0)

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  4. 01-24-2012 09:18 PM #3
    leland [OP]
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    Tried that and am in DFU mode. But now... "the iPad could not be restored because the firmware file is not compatible"

    AAARGH!!!?!?!

    How the hell do I upgrade to 5.0.1?
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  5. 01-24-2012 09:35 PM #4
    leland [OP]
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    Ok, and now it works... Bizarre. Honestly I don't think I did anything other than plug and unplug the iPad to restart iTunes. God help someone who has to troubleshoot Apple stuff for a living.
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