Bug 1027630

Summary:	PARTED should check the GPT MBR validity
Product:	[Fedora] Fedora	Reporter:	Ondrej <ovalousek>
Component:	parted	Assignee:	Brian Lane <bcl>
Status:	CLOSED WONTFIX	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	19	CC:	bcl
Target Milestone:	---
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Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	Bug Fix
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Last Closed:	2014-10-07 23:47:05 UTC	Type:	Bug
Regression:	---	Mount Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Ondrej 2013-11-07 08:49:44 UTC

Description of problem:
Parted should offer LBA-0 validity check of the GUID partition table check as per
http://en.wikipedia.org/wiki/GUID_Partition_Table
-i.e. MBR should begin with string "EFI PART"
Reason:
Some BIOSes refuse EFI boot if the MBR is not compliant

Version-Release number of selected component (if applicable):
all

How reproducible:
easily

Steps to Reproduce:
1. Take Win-8 EFI booting PC
2. Install Fedora 19 in legacy mode - LBA-0 gets destroyed as the installer overwrites MBR
3. Win-8 can not boot any longer

Expected results:
If we run parted from a recovery CD, we should be able to fix MBR

Comment 1 Brian Lane 2014-10-07 23:47:05 UTC

There are too many ways for things to be damaged. parted isn't a repair tool and really can't be expected to cover these kinds of cases. Whatever broke the MBR should stop doing that.