2.3.42 FSCTL_QUERY_ON_DISK_VOLUME_INFO Reply

This message returns the results of the FSCTL_QUERY_ON_DISK_VOLUME_INFO request (section 2.3.41).


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DirectoryCount

...

FileCount

...

FsFormatMajVersion

FsFormatMinVersion

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.<28>

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.<29>

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.<30>

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.<31>

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.<32>

This message returns a status code, as specified in [MS-ERREF] section 2.3. The status code returned directly by the function that processes this FSCTL MUST be STATUS_SUCCESS or one of the following.

Error Code

Meaning

STATUS_INVALID_USER_BUFFER

0xC00000E8

An access to a user buffer failed.

STATUS_BUFFER_TOO_SMALL

0xC0000023

The buffer is too small to contain the entry. No information has been written to the buffer.

STATUS_INVALID_PARAMETER

0xC000000D

An invalid parameter was passed to a service or function.

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