Since I personally have dealt with this issue quite a few times recently in my testing and flashing of new ROM's, I figured I'd post it up in case anyone else also had the issue.
Basically this error occurs when your phone has lagfix enabled (file system converted to EXT4) and something (possibly a flash, restore, or factory reset) brings files into the system in the stock RFS format. I.E. If you were to use odin to restore your phone to stock before converting things back to RFS.
Here is a screenshot of what this may look like if you manage to get into CWM, keep in mind sometimes you will actually revert to the stock(blue) recovery but you will see these same errors there if you're having this issue. If you bugger it up as bad as I did, you may not even get passed either recovery - you won't see the samsung logo at all as it'll go right to recovery.
NOTE: Disregard the first two errors, those errors are a result of using an older version of CWM and are normal for that version - you must have the "E: Can't mount..." errors for this to be the issue you're experiencing.
Here is the easiest fix. [This is for the Mesmerize.]
1. If you don't have a copy; download the full stock 2.2 odin package (NOT the one with custom recovery, you will need to flash that one AFTER flashing the full stock version as it won't fix the issue by itself) and of course, odin if you don't have it.
2. Load up the .pit in the .pit slot and the .tar.md5 in the PDA slot and get your phone into download mode. (I usually pull the battery, plug it in and hold volume down, there are other methods) Also check the "repartition" box.
3. Once odin see's your phone (look for a yellow COM: box) hit start and it will flash the stock files to your phone.
4. Put the battery back in and boot the phone up, we need to get the file structure converted back to RFS and you won't be able to do so through normal means.
5. Create an empty file (In windows just erase the extension) and name it "disable lagfix" no extension
6. Download QT ADB from here (or just use ADB), and move the file from your PC to the Voodoo folder on your SD card. Reboot your phone, you should hear the lagfix being disabled (robot chick voice)
7. After that is complete, all your stuff will be converted properly - but if you don't flash a clean full OS again (like you did in the first few steps) you will revert to these errors once lagfix is re-enabled. So, repeat steps 1-4, and don't forget if you want the custom recovery you can odin flash that package AFTER you use the full stock package, this is just to ensure all your files are clean and installed properly.
8. You now have a clean phone with everything in the proper format and working properly, so you know what to do from here
.
Basically this error occurs when your phone has lagfix enabled (file system converted to EXT4) and something (possibly a flash, restore, or factory reset) brings files into the system in the stock RFS format. I.E. If you were to use odin to restore your phone to stock before converting things back to RFS.
Here is a screenshot of what this may look like if you manage to get into CWM, keep in mind sometimes you will actually revert to the stock(blue) recovery but you will see these same errors there if you're having this issue. If you bugger it up as bad as I did, you may not even get passed either recovery - you won't see the samsung logo at all as it'll go right to recovery.
NOTE: Disregard the first two errors, those errors are a result of using an older version of CWM and are normal for that version - you must have the "E: Can't mount..." errors for this to be the issue you're experiencing.
Here is the easiest fix. [This is for the Mesmerize.]
1. If you don't have a copy; download the full stock 2.2 odin package (NOT the one with custom recovery, you will need to flash that one AFTER flashing the full stock version as it won't fix the issue by itself) and of course, odin if you don't have it.
2. Load up the .pit in the .pit slot and the .tar.md5 in the PDA slot and get your phone into download mode. (I usually pull the battery, plug it in and hold volume down, there are other methods) Also check the "repartition" box.
3. Once odin see's your phone (look for a yellow COM: box) hit start and it will flash the stock files to your phone.
4. Put the battery back in and boot the phone up, we need to get the file structure converted back to RFS and you won't be able to do so through normal means.
5. Create an empty file (In windows just erase the extension) and name it "disable lagfix" no extension
6. Download QT ADB from here (or just use ADB), and move the file from your PC to the Voodoo folder on your SD card. Reboot your phone, you should hear the lagfix being disabled (robot chick voice)
7. After that is complete, all your stuff will be converted properly - but if you don't flash a clean full OS again (like you did in the first few steps) you will revert to these errors once lagfix is re-enabled. So, repeat steps 1-4, and don't forget if you want the custom recovery you can odin flash that package AFTER you use the full stock package, this is just to ensure all your files are clean and installed properly.
8. You now have a clean phone with everything in the proper format and working properly, so you know what to do from here
.
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