diff options
Diffstat (limited to 'src/Common/Format.c')
| -rw-r--r-- | src/Common/Format.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/src/Common/Format.c b/src/Common/Format.c index 82c4df55..4aaf8b32 100644 --- a/src/Common/Format.c +++ b/src/Common/Format.c @@ -369,8 +369,13 @@ begin_format: if (!volParams->hiddenVol && !bInstantRetryOtherFilesys) { LARGE_INTEGER volumeSize; + BOOL speedupFileCreation = FALSE; volumeSize.QuadPart = dataAreaSize + TC_VOLUME_HEADER_GROUP_SIZE; + // speedup for file creation only makes sens when using quick format + if (volParams->quickFormat && volParams->fastCreateFile) + speedupFileCreation = TRUE; + if (volParams->sparseFileSwitch && volParams->quickFormat) { // Create as sparse file container @@ -384,12 +389,28 @@ begin_format: // Preallocate the file if (!SetFilePointerEx (dev, volumeSize, NULL, FILE_BEGIN) - || !SetEndOfFile (dev) - || SetFilePointer (dev, 0, NULL, FILE_BEGIN) != 0) + || !SetEndOfFile (dev)) + { + nStatus = ERR_OS_ERROR; + goto error; + } + + if (speedupFileCreation) + { + // accelerate file creation by telling Windows not to fill all file content with zeros + // this has security issues since it will put existing disk content into file container + // We use this mechanism only when switch /fastCreateFile specific and when quick format + // also specified and which is documented to have security issues. + // we don't check returned status because failure is not issue for us + SetFileValidData (dev, volumeSize.QuadPart); + } + + if (SetFilePointer (dev, 0, NULL, FILE_BEGIN) != 0) { nStatus = ERR_OS_ERROR; goto error; } + } } |