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# Attribute - $VOLUME_INFORMATION (0x70)

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## Overview

Indicates the version and the state of the volume.

As defined in $AttrDef, this attribute has a minimum and a maximum size of 12 bytes.

## Layout of the Attribute

Offset | Size | Description
--- | --- | ---
~ | ~ | Standard Attribute Header
0x00 | 8 | Always zero?
0x08 | 1 | Major version number
0x09 | 1 | Minor version number
0x0A | 2 | Flags
0x0C | 4 | Always zero?

### Flags

Value | Description
--- | ---
0x0001 | Dirty
0x0002 | Resize LogFile
0x0004 | Upgrade on Mount
0x0008 | Mounted on NT4
0x0010 | Delete USN underway
0x0020 | Repair Object Ids
0x8000 | Modified by chkdsk

## Notes

### Dirty Flag

When the Dirty Flag is set, Windows NT must perform the chkdsk /F command on the volume when it next boots.

### Version numbers

Operating System | NTFS Version
--- | ---
Windows NT | 1.2
Windows 2000 | 3.0
Windows XP | 3.1

### Other Information

A Volume's Serial Number is stored in $Boot.

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