22 May
2018
22 May
'18
8:24 a.m.
Otto,
Am Dienstag, 22. Mai 2018, 03:30:04 CEST schrieb Otto Blom:
Hi Richard !
To summarize the observations from the last few days.
- Linux 4.9 & U-boot 2018 behave the same when attempting to read from
a ubifs file system
- Whenever Linux 4.14 writes to a ubifs there is some form of
incompatibility introduced causing assorted errors when the file system is read in Linux 4.9 or U-boot. However the files can still be read in Linux 4.14.
This lead me to suspect a problem with the OOB data. So I copied over a 16MB textfile to a freshly minted no-compression ubifs partition (running 4.14) and ran a nanddump both from Linux 4.9 and 4.14 and the contents are different - Bit errors are present in the 4.9-dump..
This smells like a problem on MTD/NAND-Level. Decompression might fail because bits changes but didn't get fixed by your driver.
Thanks, //richard