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I went into Settings->Privacy->Factory reset and checked "Format USB Storage". Then I pressed the button to continue and it prompted for my PIN (just numbers) as usual. Then it said it was formatting the USB storage as I told it to. And then it just shut off. So I started it back up and it prompted for a password (full keyboard; any characters you want).

I don't know what I had set that password to (I haven't used that kind of a password in a while) so now I'm stuck. Going into recovery mode does the same thing. Download mode works just fine.

So now what do I do? Is there some way I can format /data manually from my computer?

Here's some more info about my device:
Samsung Galaxy Player 4.0
Samsung Galaxy S build.prop
Rooted
Stock Gingerbread ROM, stock kernel, stock recovery

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Either it's possible with the stock recovery or, last resort, go full metal jacket and install a custom recovery (and maybe also a custom rom in that course) using heimdall and this guide –  ce4 Jul 15 '12 at 9:38
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3 Answers 3

If your Recovery Mode is also password protected, you are out of luck with GUI interface from device.

Go to Download Mode and flash the ROM. This is the only solution if you don't have password.

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You can "wipe user data" from recovery mode, though that also means that you get to spend a few hours setting up your phone again.

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Except that recovery mode prompted for the password too. I couldn't do anything else. –  biggles5107 Jul 16 '12 at 16:05
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up vote 0 down vote accepted

Since I don't know what the password is, I played around with it and failed enough times that it told me that if I failed one more time I could lose data on the SD card. So I failed one more time (I didn't care about the SD card) and it did the reset just fine.

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