My Pandora has been booting off the NAND for years now. There is no problem with that, honestly.
Now, if this happens to you several times, it is most likely something like a space problem that builds up over time. Some of the old culprits were web browsers and email clients (Qupzilla and Claws mail used to have these problems earlier, at least), which redirected all visible things to the correct appdata directory, but kept an invisible cache directory in the home directory on the Nand. In that way, stuff will invisibly build up as the cache files expand over several sessions of web surfing until suddenly things does not work any more.
Quick check to see whether things are building up:
Open a terminal and type
df
This command will show the space usage on different parts of the file system. You're looking for the ubi0:rootfs numbers, in the column "Used". Note down this number. Then use your pandora normally for a week or so - Surf the web, read email, play games, whatever. Then, do it again and compare the numbers. There are some natural variations (the firmware does have some stuff there that does change), but if the "Used" number is markedly growing, or you do this test several times and see a steady growth, then you know something is eating your space. Then you come back and we continue the procedure
Now, if this happens to you several times, it is most likely something like a space problem that builds up over time. Some of the old culprits were web browsers and email clients (Qupzilla and Claws mail used to have these problems earlier, at least), which redirected all visible things to the correct appdata directory, but kept an invisible cache directory in the home directory on the Nand. In that way, stuff will invisibly build up as the cache files expand over several sessions of web surfing until suddenly things does not work any more.
Quick check to see whether things are building up:
Open a terminal and type
df
This command will show the space usage on different parts of the file system. You're looking for the ubi0:rootfs numbers, in the column "Used". Note down this number. Then use your pandora normally for a week or so - Surf the web, read email, play games, whatever. Then, do it again and compare the numbers. There are some natural variations (the firmware does have some stuff there that does change), but if the "Used" number is markedly growing, or you do this test several times and see a steady growth, then you know something is eating your space. Then you come back and we continue the procedure
