2.3.58 FSCTL_QUERY_ON_DISK_VOLUME_INFO Reply
This message returns the results of the FSCTL_QUERY_ON_DISK_VOLUME_INFO request (section 2.3.57) as a FSCTL_QUERY_ON_DISK_VOLUME_INFO_BUFFER structure.
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DirectoryCount |
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FileCount |
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FsFormatMajVersion |
FsFormatMinVersion |
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FsFormatName (24 bytes) |
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FormatTime |
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LastUpdateTime |
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CopyrightInfo (68 bytes) |
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AbstractInfo (68 bytes) |
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FormattingImplementationInfo (68 bytes) |
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LastModifyingImplementationInfo (68 bytes) |
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DirectoryCount (8 bytes): A 64-bit signed integer. The number of directories on the specified volume. This member is -1 if the number is unknown.
For UDF file systems with a virtual allocation table, this information is available only if the UDF revision of the volume is greater than 1.50.<51>
FileCount (8 bytes): A 64-bit signed integer. The number of files on the specified volume. Returns -1 if the number is unknown.
For UDF file systems with a virtual allocation table, this information is available only if the UDF revision of the volume is greater than 1.50.
FsFormatMajVersion (2 bytes): A 16-bit signed integer. The major version number of the file system. Returns -1 if the number is unknown or not applicable. For example on UDF 1.02 file systems, 1 is returned.
FsFormatMinVersion (2 bytes): A 16-bit signed integer. The minor version number of the file system. Returns -1 if the number is unknown or not applicable. For example: on UDF 1.02 file systems, 2 is returned.
FsFormatName (24 bytes): Always returns "UDF" in Unicode characters followed by nine Unicode NULL characters.
FormatTime (8 bytes): The time the volume was formatted; see section 2.1.1.
LastUpdateTime (8 bytes): The time the volume was last updated; see section 2.1.1.
CopyrightInfo (68 bytes): A Unicode string containing any copyright notifications associated with the volume. This information is implementation-specific and will be padded with NULLs.<52>
AbstractInfo (68 bytes): A Unicode string containing any abstract information written on the volume. This information is implementation-specific and will be padded with NULLs.<53>
FormattingImplementationInfo (68 bytes): A Unicode string containing the operating system version that the volume was formatted by. This information is implementation-specific and will be padded with NULLs.<54>
LastModifyingImplementationInfo (68 bytes): A Unicode string containing the operating system version that the volume was last modified by. This information is implementation-specific and will be padded with NULLs.<55>
This message returns a status code as specified in section 2.2. Upon success, the status code returned by the function that processes this FSCTL is STATUS_SUCCESS. The most common error codes are listed in the following table.
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Error Code |
Meaning |
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STATUS_INVALID_USER_BUFFER 0xC00000E8 |
An access to a user buffer failed. |
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STATUS_BUFFER_TOO_SMALL 0xC0000023 |
The buffer is too small to contain the entry. No information has been written to the buffer. |
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STATUS_INVALID_PARAMETER 0xC000000D |
An invalid parameter was passed to a service or function. |