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Add --no-rs-codes flag to optionally disable reed-solomon codes in grub-install and grub-bios-setup for x86 BIOS targets.

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Jon McCune 2013-12-09 16:52:12 -08:00
parent 7a148da6dd
commit dd73313cba
6 changed files with 81 additions and 23 deletions
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14
docs/grub.texi
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@ -5994,8 +5994,20 @@ mounted on
Recheck the device map, even if @file{/boot/grub/device.map} already
exists. You should use this option whenever you add/remove a disk
into/from your computer.
@end table
@item --no-rs-codes
By default on x86 BIOS systems, @command{grub-install} will use some
extra space in the bootloader embedding area for Reed-Solomon
error-correcting codes. This enables GRUB to still boot successfully
if some blocks are corrupted. The exact amount of protection offered
is dependent on available space in the embedding area. R sectors of
redundancy can tolerate up to R/2 corrupted sectors. This
redundancy may be cumbersome if attempting to cryptographically
validate the contents of the bootloader embedding area, or in more
modern systems with GPT-style partition tables (@pxref{BIOS
installation}) where GRUB does not reside in any unpartitioned space
outside of the MBR. Disable the Reed-Solomon codes with this option.
@end table
@node Invoking grub-mkconfig
@chapter Invoking grub-mkconfig