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[format] fixed corruption issue when MBR is garbage

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* after a bb check, MBR could become garbage
* when that occurs, Windows might interpret a bad partition table and prevent MBR from being properly written
* force a complete zeroing of the whole MBR before partitioning to fix this
* also added error code for bb
This commit is contained in:
Pete Batard 2011-12-06 18:11:38 +00:00
parent 5c2242beaa
commit 480986b0ae
7 changed files with 39 additions and 7 deletions
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19
src/format.c
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@ -212,6 +212,16 @@ static BOOL AnalyzeMBR(HANDLE hPhysicalDrive)
return TRUE;
}
static BOOL ClearMBR(HANDLE hPhysicalDrive)
{
FILE fake_fd;
fake_fd._ptr = (char*)hPhysicalDrive;
fake_fd._bufsiz = SelectedDrive.Geometry.BytesPerSector;
return clear_mbr(&fake_fd);
}
/*
* Process the Master Boot Record
*/
@ -335,11 +345,20 @@ void __cdecl FormatThread(void* param)
SelectedDrive.Geometry.BytesPerSector, BADBLOCKS_RW)) {
// TODO: report block failure number, etc
uprintf("Bad blocks check failed.\n");
FormatStatus = ERROR_SEVERITY_ERROR|FAC(FACILITY_STORAGE)|APPERR(ERROR_BADBLOCKS);
goto out;
}
safe_unlockclose(hLogicalVolume);
}
// Especially after destructive badblocks test, you must zero the MBR completely
// before repartitioning. Else, all kind of bad things happen
if (!ClearMBR(hPhysicalDrive)) {
uprintf("unable to zero MBR\n");
FormatStatus = ERROR_SEVERITY_ERROR|FAC(FACILITY_STORAGE)|ERROR_WRITE_FAULT;
goto out;
}
if (!CreatePartition(hPhysicalDrive)) {
FormatStatus = ERROR_SEVERITY_ERROR|FAC(FACILITY_STORAGE)|ERROR_PARTITION_FAILURE;
goto out;