From: Tom Rini <trini@ti.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v1] DOS_PBR block type is also valid dos block type.
Date: Fri, 15 Mar 2013 13:29:27 -0400 [thread overview]
Message-ID: <51435A77.1090809@ti.com> (raw)
In-Reply-To: <514355B5.8080803@wwwdotorg.org>
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On 03/15/2013 01:09 PM, Stephen Warren wrote:
> On 03/15/2013 12:36 AM, Sonic Zhang wrote: ...
>> We can erase the first 3 blocks completely before formatting it
>> again. But, nothing can prevent others from formatting the SD
>> card with different tools.
>
> Surely any tool that creates a partition table on a device when
> there wasn't any partition table there before (i.e. converts a raw
> filesystem to a partition table) should zero out the "boot code"
> area of that MBR, since there is no "boot code" area in a raw
> filesystem. This seems like a bug in whatever partitioning tool was
> used.
>
> If any device /always/ historically contained a real partition
> table, or /always/ contained a raw FAT filesystem, then there will
> be no issue. It's only when switching between the two, and not
> clearing out all the data in the MBR when doing so, that you get
> this problem.
To me the question is, are we looking at a "torture card" that doesn't
really contain a compliant set of choices, but happens to not fail in
other cases (that don't play clever games like we do) or a really
valid card and we need to make a harder choice.
- --
Tom
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next prev parent reply other threads:[~2013-03-15 17:29 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-11 9:56 [U-Boot] [PATCH v1] DOS_PBR block type is also valid dos block type sonic.adi at gmail.com
2013-03-11 17:28 ` Stephen Warren
2013-03-12 2:59 ` Sonic Zhang
2013-03-13 17:11 ` Stephen Warren
2013-03-14 2:51 ` Sonic Zhang
2013-03-14 4:36 ` Stephen Warren
2013-03-14 7:31 ` Sonic Zhang
2013-03-14 17:53 ` Stephen Warren
2013-03-15 5:10 ` Stephen Warren
2013-03-15 6:36 ` Sonic Zhang
2013-03-15 13:14 ` Tom Rini
2013-03-15 17:09 ` Stephen Warren
2013-03-15 17:29 ` Tom Rini [this message]
2013-03-15 12:46 ` Tom Rini
2013-03-15 17:07 ` Stephen Warren
[not found] ` <CAJxxZ0Pk2CtS0FuYJyZDqq3NyUZEnCjnjsksx7buv8RiLf+3vQ@mail.gmail.com>
[not found] ` <513E9C79.2000708@wwwdotorg.org>
2013-03-13 2:58 ` Sonic Zhang
2013-03-13 16:51 ` Stephen Warren
2013-03-13 17:01 ` Stephen Warren
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