I have used ubi filesystem and mtd subsystem to work on the top of NAND flash. It was working fine.
But now I'm finding the following errors:
UBI error: ubi_io_read: error -74 while reading 516096 bytes from PEB 2701:8192, read 516096 bytes
end_request: I/O error, dev mtdblock5, sector 49160
what is the reason for those errors which I have mentioned above? How to recover from these error?
Both shows I/O errors which is related to corruption or bad block on your NAND Flash, try using another flash and use it. You can also try erasing flash and trying it again.
Thanks & Regards,
Alok Thaker