UBIFS ECC errors

[Sergeant Peppercorn <speppercorn109@xxxxxxxxx>]

I've seen this type of error posted before but I seem to be having a
different issue. I am being plagued with the following problem while
trying to mount our rootfs which is a UBIFS NAND partition. The
differences I see between our occurrences and others is that this is
extremely intermittent, and in some cases, it recovers and then boots
correctly, but in other cases, it continues, making the unit unusable.
I have been postulating anything from bad NAND hardware to power
supply issues to UBI bugs, etc. I am running a very old kernel
(3.12.10 with TI patches for ARM Sitara AM355x CPUs) which works just
find except for this issue, but this issue seems to be happening also
with a 4.9.88 kernel with NXP iMX patches on different hardware, so I
have a difficult time accepting that it is due to the age of the
kernel. That being said, I am open to anything, as this seems to be an
impossible problem. Any tips as to how to debug this would be greatly
appreciated. I would rather not have to re-flash many thousands of
units in the field if there is any sort of other solution. A patched
kernel or uboot with different kernel boot parameters would be the
ideal solution, if it exists. Thanks in advance for any help.

UBIFS: background thread "ubifs_bgt0_0" started, PID 779
UBIFS: recovery needed
UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976
bytes from PEB 679:4096, read only 126976 bytes, retry
UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976
bytes from PEB 679:4096, read only 126976 bytes, retry
UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976
bytes from PEB 679:4096, read only 126976 bytes, retry
UBI error: ubi_io_read: error -74 (ECC error) while reading 126976
bytes from PEB 679:4096, read 126976 bytes
UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976
bytes from PEB 679:4096, read only 126976 bytes, retry
UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976
bytes from PEB 679:4096, read only 126976 bytes, retry
UBI warning: ubi_io_read: error -74 (ECC error) while reading 126976
bytes from PEB 679:4096, read only 126976 bytes, retry
UBI error: ubi_io_read: error -74 (ECC error) while reading 126976
bytes from PEB 679:4096, read 126976 bytes
UBIFS error (pid 1): ubifs_recover_leb: corrupt empty space LEB
7:2048, corruption starts at 2241
UBIFS error (pid 1): ubifs_scanned_corruption: corruption at LEB 7:4289
UBIFS error (pid 1): ubifs_scanned_corruption: first 8192 bytes from LEB 7:4289
UBIFS error (pid 1): ubifs_recover_leb: LEB 7 scanning failed
UBIFS: background thread "ubifs_bgt0_0" stops
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

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