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[core] try not to clear MBR/GPT sectors higher than the lowest partition

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* This ensures that a drive can be reformatted without error after writing
  an image such as super_grub2_disk_x86_64_efi_2.02s4.iso
This commit is contained in:
Pete Batard 2016-07-07 18:13:01 +01:00
parent 2f88286dc1
commit 91eec034b1
4 changed files with 29 additions and 17 deletions
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18
src/drive.c
View file

@ -108,7 +108,7 @@ BOOL GetAutoMount(BOOL* enabled)
*/
#define CheckDriveIndex(DriveIndex) do { \
if ((DriveIndex < DRIVE_INDEX_MIN) || (DriveIndex > DRIVE_INDEX_MAX)) { \
uprintf("ERROR: Bad index value. Please check the code!\n"); \
uprintf("ERROR: Bad index value %d. Please check the code!", DriveIndex); \
goto out; \
} \
DriveIndex -= DRIVE_INDEX_MIN; } while (0)
@ -691,6 +691,7 @@ BOOL GetDrivePartitionData(DWORD DriveIndex, char* FileSystemName, DWORD FileSys
}
SelectedDrive.DiskSize = DiskGeometry->DiskSize.QuadPart;
SelectedDrive.SectorSize = DiskGeometry->Geometry.BytesPerSector;
SelectedDrive.FirstDataSector = MAXDWORD;
if (SelectedDrive.SectorSize < 512) {
suprintf("Warning: Drive 0x%02x reports a sector size of %d - Correcting to 512 bytes.\n",
DriveIndex, SelectedDrive.SectorSize);
@ -741,12 +742,15 @@ BOOL GetDrivePartitionData(DWORD DriveIndex, char* FileSystemName, DWORD FileSys
}
}
// NB: MinGW's gcc 4.9.2 broke "%lld" printout on XP so we use the inttypes.h "PRI##" qualifiers
suprintf(" Type: %s (0x%02x)\r\n Size: %s (%" PRIi64 " bytes)\r\n Start Sector: %d, Boot: %s, Recognized: %s\n",
suprintf(" Type: %s (0x%02x)\r\n Size: %s (%" PRIi64 " bytes)\r\n Start Sector: %" PRIi64 ", Boot: %s, Recognized: %s\n",
((part_type==0x07)&&(FileSystemName[0]!=0))?FileSystemName:GetPartitionType(part_type), part_type,
SizeToHumanReadable(DriveLayout->PartitionEntry[i].PartitionLength.QuadPart, TRUE, FALSE),
DriveLayout->PartitionEntry[i].PartitionLength.QuadPart, DriveLayout->PartitionEntry[i].Mbr.HiddenSectors,
DriveLayout->PartitionEntry[i].PartitionLength.QuadPart,
DriveLayout->PartitionEntry[i].StartingOffset.QuadPart / SelectedDrive.SectorSize,
DriveLayout->PartitionEntry[i].Mbr.BootIndicator?"Yes":"No",
DriveLayout->PartitionEntry[i].Mbr.RecognizedPartition?"Yes":"No");
SelectedDrive.FirstDataSector = min(SelectedDrive.FirstDataSector,
(DWORD)(DriveLayout->PartitionEntry[i].StartingOffset.QuadPart / SelectedDrive.SectorSize));
if ((part_type == RUFUS_EXTRA_PARTITION_TYPE) || (isUefiNtfs))
// This is a partition Rufus created => we can safely ignore it
--SelectedDrive.nPartitions;
@ -768,9 +772,13 @@ BOOL GetDrivePartitionData(DWORD DriveIndex, char* FileSystemName, DWORD FileSys
suprintf("Partition %d:\r\n Type: %s\r\n Name: '%s'\n", i+1,
GuidToString(&DriveLayout->PartitionEntry[i].Gpt.PartitionType), tmp);
suprintf(" ID: %s\r\n Size: %s (%" PRIi64 " bytes)\r\n Start Sector: %" PRIi64 ", Attributes: 0x%016" PRIX64 "\n",
GuidToString(&DriveLayout->PartitionEntry[i].Gpt.PartitionId), SizeToHumanReadable(DriveLayout->PartitionEntry[i].PartitionLength.QuadPart, TRUE, FALSE),
DriveLayout->PartitionEntry[i].PartitionLength, DriveLayout->PartitionEntry[i].StartingOffset.QuadPart / DiskGeometry->Geometry.BytesPerSector,
GuidToString(&DriveLayout->PartitionEntry[i].Gpt.PartitionId),
SizeToHumanReadable(DriveLayout->PartitionEntry[i].PartitionLength.QuadPart, TRUE, FALSE),
DriveLayout->PartitionEntry[i].PartitionLength,
DriveLayout->PartitionEntry[i].StartingOffset.QuadPart / SelectedDrive.SectorSize,
DriveLayout->PartitionEntry[i].Gpt.Attributes);
SelectedDrive.FirstDataSector = min(SelectedDrive.FirstDataSector,
(DWORD)(DriveLayout->PartitionEntry[i].StartingOffset.QuadPart / SelectedDrive.SectorSize));
// Don't register the partitions that we don't care about destroying
if ( (strcmp(tmp, "UEFI:NTFS") == 0) ||
(CompareGUID(&DriveLayout->PartitionEntry[i].Gpt.PartitionType, &PARTITION_MSFT_RESERVED_GUID)) ||

2
src/drive.h
View file

@ -61,7 +61,7 @@ typedef struct {
DWORD DeviceNumber;
DWORD SectorsPerTrack;
DWORD SectorSize;
DWORD FirstSector;
DWORD FirstDataSector;
MEDIA_TYPE MediaType;
int PartitionType;
int nPartitions; // number of partitions we actually care about

16
src/format.c
View file

@ -808,7 +808,7 @@ out:
static BOOL ClearMBRGPT(HANDLE hPhysicalDrive, LONGLONG DiskSize, DWORD SectorSize, BOOL add1MB)
{
BOOL r = FALSE;
uint64_t i, last_sector = DiskSize/SectorSize;
uint64_t i, last_sector = DiskSize/SectorSize, num_sectors_to_clear;
unsigned char* pBuf = (unsigned char*) calloc(SectorSize, 1);
PrintInfoDebug(0, MSG_224);
@ -820,10 +820,14 @@ static BOOL ClearMBRGPT(HANDLE hPhysicalDrive, LONGLONG DiskSize, DWORD SectorSi
// beginning and 33 at the end. We bump these values to MAX_SECTORS_TO_CLEAR each end to help
// with reluctant access to large drive.
// Must clear at least 1MB + the PBR for large FAT32 format to work on a large drive
// Don't do it if Large FAT32 is not enabled, as it can take time for slow drives.
uprintf("Erasing %d sectors", (add1MB?2048:0)+MAX_SECTORS_TO_CLEAR);
for (i=0; i<((add1MB?2048:0)+MAX_SECTORS_TO_CLEAR); i++) {
// We try to clear at least 1MB + the PBR when Large FAT32 is selected (add1MB), but
// don't do it otherwise, as it seems unnecessary and may take time for slow drives.
// Also, for various reasons (one of which being that Windows seems to have issues
// with GPT drives that contain a lot of small partitions) we try not not to clear
// sectors further than the lowest partition already residing on the disk.
num_sectors_to_clear = min(SelectedDrive.FirstDataSector, (add1MB ? 2048 : 0) + MAX_SECTORS_TO_CLEAR);
uprintf("Erasing %d sectors", num_sectors_to_clear);
for (i=0; i<num_sectors_to_clear; i++) {
if ((IS_ERROR(FormatStatus)) || (write_sectors(hPhysicalDrive, SectorSize, i, 1, pBuf) != SectorSize)) {
goto out;
}
@ -1678,7 +1682,7 @@ DWORD WINAPI FormatThread(void* param)
// Note, Microsoft's way of cleaning partitions (IOCTL_DISK_CREATE_DISK, which is what we apply
// in InitializeDisk) is *NOT ENOUGH* to reset a disk and can render it inoperable for partitioning
// or formatting under Windows. See https://github.com/pbatard/rufus/issues/759 for details.
if ((!ClearMBRGPT(hPhysicalDrive, SelectedDrive.DiskSize, SelectedDrive.SectorSize, FALSE)) || (!InitializeDisk(hPhysicalDrive)) ) {
if ((!ClearMBRGPT(hPhysicalDrive, SelectedDrive.DiskSize, SelectedDrive.SectorSize, use_large_fat32)) || (!InitializeDisk(hPhysicalDrive)) ) {
uprintf("Could not reset partitions\n");
FormatStatus = ERROR_SEVERITY_ERROR|FAC(FACILITY_STORAGE)|ERROR_PARTITION_FAILURE;
goto out;

10
src/rufus.rc
View file

@ -33,7 +33,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
IDD_DIALOG DIALOGEX 12, 12, 242, 376
STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
EXSTYLE WS_EX_ACCEPTFILES
CAPTION "Rufus 2.10.966"
CAPTION "Rufus 2.10.967"
FONT 8, "Segoe UI Symbol", 400, 0, 0x0
BEGIN
LTEXT "Device",IDS_DEVICE_TXT,9,6,200,8
@ -320,8 +320,8 @@ END
//
VS_VERSION_INFO VERSIONINFO
FILEVERSION 2,10,966,0
PRODUCTVERSION 2,10,966,0
FILEVERSION 2,10,967,0
PRODUCTVERSION 2,10,967,0
FILEFLAGSMASK 0x3fL
#ifdef _DEBUG
FILEFLAGS 0x1L
@ -338,13 +338,13 @@ BEGIN
BEGIN
VALUE "CompanyName", "Akeo Consulting (http://akeo.ie)"
VALUE "FileDescription", "Rufus"
VALUE "FileVersion", "2.10.966"
VALUE "FileVersion", "2.10.967"
VALUE "InternalName", "Rufus"
VALUE "LegalCopyright", "© 2011-2016 Pete Batard (GPL v3)"
VALUE "LegalTrademarks", "http://www.gnu.org/copyleft/gpl.html"
VALUE "OriginalFilename", "rufus.exe"
VALUE "ProductName", "Rufus"
VALUE "ProductVersion", "2.10.966"
VALUE "ProductVersion", "2.10.967"
END
END
BLOCK "VarFileInfo"