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Re: grub mishandles corrupt/missing primary GPT
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From: |
Vladimir 'φ-coder/phcoder' Serbinenko |
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Subject: |
Re: grub mishandles corrupt/missing primary GPT |
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Date: |
Mon, 09 Dec 2013 16:54:10 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20131103 Icedove/17.0.10 |
On 09.12.2013 16:28, Phillip Susi wrote:
> On 10/23/2013 9:49 PM, Vladimir 'φ-coder/phcoder' Serbinenko wrote:
>> partmap module is size-critical and CRC32 verification is pretty
>> big. There are 3 problems with backup header:
>
> The grub core no longer fits in 63 sectors in all but the most trivial
> configurations as it is,
Not true. I've checked: all configs not involving compressed fs or
diskfilter fit in 31K.
> and a 2048 sector embed area has been
> standard now for several years, so I don't think size is a problem.
>
We're speaking abut GPT, nothing to do with MBR embed area.
My problem with that is that it increases complexity a lot in currently
simple code.
And also I had experience with backup header out of place due to disk
reconfiguration and primary header corrupted but still well enough to
have valid partitions. I could boot this system by using "gpt" linux
option. With proposed changes this system would become unbootable.
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