From: Boris Brezillon <boris.brezillon@bootlin.com>
To: Yannick Lanz <yannick.lanz@wifx.net>
Cc: "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>
Subject: Re: bad block table erased by u-boot's ubi part command
Date: Fri, 26 Oct 2018 22:56:51 +0200 [thread overview]
Message-ID: <20181026225651.24be0d06@bbrezillon> (raw)
In-Reply-To: <A5CEBF07E04C514A9C56312C6027F32186A8C57B@SWIFXDC01.lan.wifx.net>
On Fri, 26 Oct 2018 16:21:37 +0000
Yannick Lanz <yannick.lanz@wifx.net> wrote:
>
> If a mount the UBI partition in U-Boot, then the bad block table is never found
> in the kernel and always recreated. The other strange point is that U-Boot
> doesn't find the 4 bad block found by the kernel.
>
> If I reboot without mounting the UBI partition in U-Boot, then the bad block
> table is directly discovered by the kernel following its creation on latest boot.
> It seems that U-Boot is destroying the bad block table.
>
> Do you have any idea what's happening ?
Probably because u-boot does not have on-flash-bbt enabled, so it's
assuming the blocks reserved by Linux for the bad block table are free,
and when UBI is attached to the last partition it picks the last 4
blocks and writes its metadata on it.
next prev parent reply other threads:[~2018-10-26 20:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-26 16:21 bad block table erased by u-boot's ubi part command Yannick Lanz
2018-10-26 20:56 ` Boris Brezillon [this message]
2018-10-27 11:13 ` Yannick Lanz
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