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Hidden volumes are forced to quick format to avoid rewriting the hidden data area. Keep that behavior while skipping the file-container allocation shortcut that writes plaintext zero sectors at 128 MiB intervals.

The allocation shortcut remains enabled for non-hidden file containers; hidden containers now use only the encrypted formatter write path for sectors that are written.
This commit is contained in:
Mounir IDRASSI
2026-06-03 07:32:17 +02:00
committed by GitHub
parent 9ef369bd45
commit 689a59cd58
2 changed files with 6 additions and 4 deletions
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src/Common/Fat.c
+3 -2
View File
@@ -271,6 +271,7 @@ FormatFat (void* hwndDlgPtr, unsigned __int64 startSector, fatparams * ft, void
volatile FORMAT_VOL_PARAMETERS* volParams = (volatile FORMAT_VOL_PARAMETERS*)volParamsArg;
BOOL quickFormat = volParams->quickFormat;
BOOL bDevice = volParams->bDevice;
BOOL hiddenVol = volParams->hiddenVol;
LARGE_INTEGER startOffset;
LARGE_INTEGER newOffset;
@@ -480,12 +481,12 @@ FormatFat (void* hwndDlgPtr, unsigned __int64 startSector, fatparams * ft, void
burn (&tmpCI, sizeof (tmpCI));
VirtualUnlock (&tmpCI, sizeof (tmpCI));
}
else if (!bDevice)
else if (!bDevice && !hiddenVol)
{
if (!FlushFormatWriteBuffer (dev, write_buf, &write_buf_cnt, &nSecNo, cryptoInfo))
goto fail;
// Quick format: write a zeroed sector every 128 MiB, leaving other sectors untouched
// Quick format of a non-hidden file container: write a zeroed sector every 128 MiB, leaving other sectors untouched
// This helps users visualize the progress of actual file creation while forcing Windows
// to allocate the disk space of each 128 MiB chunk immediately, otherwise, Windows
// would delay the allocation until we write the backup header at the end of the volume which
src/Common/Format.c
+3 -2
View File
@@ -914,6 +914,7 @@ int FormatNoFs (HWND hwndDlg, unsigned __int64 startSector, unsigned __int64 num
CRYPTOPP_ALIGN_DATA(16) char originalK2[MASTER_KEYDATA_SIZE];
BOOL quickFormat = volParams->quickFormat;
BOOL bDevice = volParams->bDevice;
BOOL hiddenVol = volParams->hiddenVol;
LARGE_INTEGER startOffset;
LARGE_INTEGER newOffset;
@@ -999,9 +1000,9 @@ int FormatNoFs (HWND hwndDlg, unsigned __int64 startSector, unsigned __int64 num
if (!FlushFormatWriteBuffer (dev, write_buf, &write_buf_cnt, &nSecNo, cryptoInfo))
goto fail;
}
else if (!bDevice)
else if (!bDevice && !hiddenVol)
{
// Quick format: write a zeroed sector every 128 MiB, leaving other sectors untouched
// Quick format of a non-hidden file container: write a zeroed sector every 128 MiB, leaving other sectors untouched
// This helps users visualize the progress of actual file creation while forcing Windows
// to allocate the disk space of each 128 MiB chunk immediately, otherwise, Windows
// would delay the allocation until we write the backup header at the end of the volume which