请问，如何用程序代码判断NTFS磁盘是否压缩？

[bizhan]

请问，如何用程序判断NTFS区盘是否已经被压缩？

比如C盘或者D盘，如何判断它已经被压缩或者未被压缩？

谢谢大家！

[scq2099yt]

up

[珍惜生命远离CPP]

BOOL GetVolumeInformation(
  LPCTSTR lpRootPathName,
  LPTSTR lpVolumeNameBuffer,
  DWORD nVolumeNameSize,
  LPDWORD lpVolumeSerialNumber,
  LPDWORD lpMaximumComponentLength,
  LPDWORD lpFileSystemFlags,
  LPTSTR lpFileSystemNameBuffer,
  DWORD nFileSystemNameSize
);

lpFileSystemFlags
[out] A pointer to a variable that receives flags associated with the specified file system.
This parameter can be one or more of the following flags; however, FS_FILE_COMPRESSION and FS_VOL_IS_COMPRESSED are mutually exclusive.

Value Meaning
FILE_NAMED_STREAMS The file system supports named streams.
FILE_READ_ONLY_VOLUME The specified volume is read-only.
Windows 2000/NT and Windows Me/98/95: This value is not supported.
FILE_SUPPORTS_OBJECT_IDS The file system supports object identifiers.
FILE_SUPPORTS_REPARSE_POINTS The file system supports re-parse points.
FILE_SUPPORTS_SPARSE_FILES The file system supports sparse files.
FILE_VOLUME_QUOTAS The file system supports disk quotas.
FS_CASE_IS_PRESERVED The file system preserves the case of file names when it places a name on disk.
FS_CASE_SENSITIVE The file system supports case-sensitive file names.
FS_FILE_COMPRESSION The file system supports file-based compression.
FS_FILE_ENCRYPTION The file system supports the Encrypted File System (EFS).
FS_PERSISTENT_ACLS The file system preserves and enforces access control lists (ACL). For example, the NTFS file system preserves and enforces ACLs, and the FAT file system does not.
FS_UNICODE_STORED_ON_DISK The file system supports Unicode in file names as they appear on disk.
FS_VOL_IS_COMPRESSED The specified volume is a compressed volume; for example, a DoubleSpace volume.

[bizhan]

akirya，您好，谢谢回答。

FS_FILE_COMPRESSION The file system supports file-based compression.

这个是表示该文件系统支持压缩，还是表明该文件系统已经被压缩？我需要是判断后者

[bizhan]

汗，应该是最后那个才对
FS_VOL_IS_COMPRESSED The specified volume is a compressed volume; for example, a DoubleSpace volume.

[珍惜生命远离CPP]

:D
我看到压缩就帖上来了。应该是最后一个