A change in CHKDSK

Bought a new Compaq. Came with XP Home/SP2.
Installed a bunch of my applications. Made
a backup clone and Decided to run CHKDSK
on the backup clone.

Ran all five checking segments as usual and
found no problem. But there was a new line
that I'd never seen before. In the fourth
segment, there was a line announcing

Usn Journal verification.

Any explanation?

Here is a description of USN Journal from Microsoft:

"The update sequence number (USN) change journal, which provides a
persistent log of all changes made to files on the volume. As files,
directories, and other NTFS objects are added, deleted, and modified,
NTFS enters records into the USN change journal, one for each volume on
the computer. Each record indicates the type of change and the object
changed. New records are appended to the end of the stream."

"Programs can consult the USN change journal to determine all the
modifications made to a set of files. The USN change journal is much
more efficient than checking time stamps or registering for file
notifications. The USN change journal is enabled and used by the
Indexing Service, File Replication Service (FRS), Remote Installation
Service (RIS), and Remote Storage."


--
Carey Frisch
Microsoft MVP
Windows Shell/User

---------------------------------------------------------------------------------

"William B. Lurie" wrote:

| Bought a new Compaq. Came with XP Home/SP2.
| Installed a bunch of my applications. Made
| a backup clone and Decided to run CHKDSK
| on the backup clone.
|
| Ran all five checking segments as usual and
| found no problem. But there was a new line
| that I'd never seen before. In the fourth
| segment, there was a line announcing
|
| Usn Journal verification.
|
| Any explanation?

Carey Frisch [MVP] wrote:
Here is a description of USN Journal from Microsoft:

"The update sequence number (USN) change journal, which provides a
persistent log of all changes made to files on the volume. As files,
directories, and other NTFS objects are added, deleted, and modified,
NTFS enters records into the USN change journal, one for each volume on
the computer. Each record indicates the type of change and the object
changed. New records are appended to the end of the stream."

"Programs can consult the USN change journal to determine all the
modifications made to a set of files. The USN change journal is much
more efficient than checking time stamps or registering for file
notifications. The USN change journal is enabled and used by the
Indexing Service, File Replication Service (FRS), Remote Installation
Service (RIS), and Remote Storage."


Thank you, Carey. That sounds like a useful tool.
But it wasn't in the XP-Pro that died with my
old PC, and it is in the XP-Home that came with
my replacement. Is Home versus Pro the difference?
Or is it that HP's OEM-based OS does some USN
checking in chkdsk that the previous OEM didn't?