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Date: Tue, 16 Dec 2014 10:21:18 +0100
From: Richard Weinberger <richard@nod.at>
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To: hujianyang <hujianyang@huawei.com>, Artem Bityutskiy <dedekind1@gmail.com>
Subject: Re: [PATCH] UBI: add ubi_err() to report the failure of leb read
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Am 16.12.2014 um 09:02 schrieb hujianyang:
> Hi,
> 
> I met a problem that I was failed to mount a UBIFS partition.
> 
> [   38.442770] UBI error: ubi_io_read: error -74 (ECC error) while reading 26624 bytes from PEB 54:104448, read 26624 bytes
> [   38.852461] UBI error: ubi_io_read: error -74 (ECC error) while reading 77824 bytes from PEB 346:53248, read 77824 bytes
> [   38.864142] UBIFS error (pid 1444): ubifs_recover_leb: corruption -3
> [   38.870487] UBIFS error (pid 1444): ubifs_scanned_corruption: corruption at LEB 928:55280
> [   38.878625] UBIFS error (pid 1444): ubifs_scanned_corruption: first 8192 bytes from LEB 928:55280
> [   38.892117] UBIFS error (pid 1444): ubifs_recover_leb: LEB 928 scanning failed
> mount: mounting ubi1:bak on /HFFS2: failed: Structure needs cleaning
> 
> I think it is caused by an ECC error of nand flash. Do we have some methods
> to mount this partition? Data losing is acceptable.

I don't think that UBIFS has such a mount option.
You can dump the raw data and inspect the corrupted data.
Maybe you can fix it by hand.

Thanks,
//richard