FSUTIL, hardlink not working

Pegasus (MVP) wrote:

> Google is your friend:
> http://www.jsifaq.com/SF/Tips/Tip.aspx?id=10153

google is not frend as YOU are!
i googled for weeks and i'v never seen that link
i'm not used to post without searching in google, sorry you supposed it.


anyway,
my problem remains the same:

let me explain my "experiment" with the following sequence:
(the OS messages are in italian language, but you can simply repeat my
experiment and read your OS messages)

=== TOP ===

C:\test>md a b

C:\test>cd a

C:\test\a>copy con original_file.txt
This is the original file.
^Z
1 file copiati.

C:\test\a>cd ..\b



C:\test\b>fsutil hardlink create hardlinked.txt ..\a\original_file.txt
Collegamento hardware creato per C:\test\b\hardlinked.txt <<===>>
C:\test\a\orig

C:\test\b>edit hardlinked.txt

C:\test\b>type hardlinked.txt
This is the original file.
LINE ADDED USING HARDLINKED.TXT


C:\test\b>cd..\a

C:\test\a>type original_file.txt
This is the original file.

=== BOTTOM ===

as you can see the original file was not updated.
this doesn't seem an hardlink to me.
i've not controlled sizes, but content.

what was wrong? :-/

Thanks for your time and kind attention

"Bertoldino" <finchelabarca RemoveThis @efelidi.invalid> wrote in message
news:emZnvTlPIHA.5976@TK2MSFTNGP05.phx.gbl...
> Pegasus (MVP) wrote:
>
>> Google is your friend:
>> http://www.jsifaq.com/SF/Tips/Tip.aspx?id=10153
>
> google is not frend as YOU are!
> i googled for weeks and i'v never seen that link
> i'm not used to post without searching in google, sorry you supposed it.
>
>
> anyway,
> my problem remains the same:
>
> let me explain my "experiment" with the following sequence:
> (the OS messages are in italian language, but you can simply repeat my
> experiment and read your OS messages)
>
> === TOP ===
>
> C:\test>md a b
>
> C:\test>cd a
>
> C:\test\a>copy con original_file.txt
> This is the original file.
> ^Z
> 1 file copiati.
>
> C:\test\a>cd ..\b
>
>
>
> C:\test\b>fsutil hardlink create hardlinked.txt ..\a\original_file.txt
> Collegamento hardware creato per C:\test\b\hardlinked.txt <<===>>
> C:\test\a\orig
>
> C:\test\b>edit hardlinked.txt
>
> C:\test\b>type hardlinked.txt
> This is the original file.
> LINE ADDED USING HARDLINKED.TXT
>
>
> C:\test\b>cd..\a
>
> C:\test\a>type original_file.txt
> This is the original file.
>
> === BOTTOM ===
>
> as you can see the original file was not updated.
> this doesn't seem an hardlink to me.
> i've not controlled sizes, but content.
>
> what was wrong? :-/
>
> Thanks for your time and kind attention
>
>

Some of your commands are back to front. Try this little batch file:
@echo off
dir c:\ > c:\original.txt
fsutil hardlink create c:\linked.txt c:\original.txt
echo Viva l'Italia! >> c:\linked.txt
type c:\original.txt

Pegasus (MVP) wrote:

> Some of your commands are back to front. Try this little batch file:
> @echo off
> dir c:\ > c:\original.txt
> fsutil hardlink create c:\linked.txt c:\original.txt
> echo Viva l'Italia! >> c:\linked.txt
> type c:\original.txt

gosh
i've tried, they work perfectly and the problem is that they seem to be
identical to my instruction sequence (except for the command itself, you
used pipe commands with dir, i used direct input)



please help me understand ...
the sequence is:

create original file / test content

create hard link to the original file
write to the hard link
test content of the original file ; if content is updated, hardlink is
working, else ... i'm not able to use FSUTUL !

sorry if i'm a little blockhead ... but i'm going on reading and reading
your example and mine... and i can't see where is the problem

"Bertoldino" <finchelabarca RemoveThis @efelidi.invalid> wrote in message
news:ehZN$HJQIHA.4712@TK2MSFTNGP04.phx.gbl...
> Pegasus (MVP) wrote:
>
>> Some of your commands are back to front. Try this little batch file:
>> @echo off
>> dir c:\ > c:\original.txt
>> fsutil hardlink create c:\linked.txt c:\original.txt
>> echo Viva l'Italia! >> c:\linked.txt
>> type c:\original.txt
>
> gosh
> i've tried, they work perfectly and the problem is that they seem to be
> identical to my instruction sequence (except for the command itself, you
> used pipe commands with dir, i used direct input)
>
>
>
> please help me understand ...
> the sequence is:
>
> create original file / test content
>
> create hard link to the original file
> write to the hard link
> test content of the original file ; if content is updated, hardlink is
> working, else ... i'm not able to use FSUTUL !
>
> sorry if i'm a little blockhead ... but i'm going on reading and reading
> your example and mine... and i can't see where is the problem

Writing pseudo-code is fine when explaining a general
principle but is of no use when it comes to debugging.
I created a batch file for you that shows how the hardlink
concept works. You now need to create your own batch
file to demonstrate how it does NOT work when you do it.

> Writing pseudo-code is fine when explaining a general
> principle but is of no use when it comes to debugging.
> I created a batch file for you that shows how the hardlink
> concept works. You now need to create your own batch
> file to demonstrate how it does NOT work when you do it.

yes,
i recreated perfectly a batch file with your concept in mind and it worked
fine:

==my sample: ==

time /T >original.txt
fsutil hardlink create hardlink.txt original.txt
date /T >>hardlink.txt
md sample
move hardlink.txt .\sample
type .\sample\hardlink.txt

== end of my sample ==

it works.
but when i do the following in interactive mode (by hand), it doesn't work:

copy con original.txt
{typing something, then ctrl-z, return}
fsutil hardlink create linked.txt original.txt
edit linked.txt
{modify somewhat}
type original.txt

the resulting file is not modified
and the same thing happens if i use notepad (not only "edit")

"Bertoldino" <finchelabarca.TakeThisOut@efelidi.invalid> wrote in message
news:OghfQuKQIHA.2208@TK2MSFTNGP06.phx.gbl...
>> Writing pseudo-code is fine when explaining a general
>> principle but is of no use when it comes to debugging.
>> I created a batch file for you that shows how the hardlink
>> concept works. You now need to create your own batch
>> file to demonstrate how it does NOT work when you do it.
>
> yes,
> i recreated perfectly a batch file with your concept in mind and it worked
> fine:
>
> ==my sample: ==
>
> time /T >original.txt
> fsutil hardlink create hardlink.txt original.txt
> date /T >>hardlink.txt
> md sample
> move hardlink.txt .\sample
> type .\sample\hardlink.txt
>
> == end of my sample ==
>
> it works.
> but when i do the following in interactive mode (by hand), it doesn't
> work:
>
> copy con original.txt
> {typing something, then ctrl-z, return}
> fsutil hardlink create linked.txt original.txt
> edit linked.txt
> {modify somewhat}
> type original.txt
>
> the resulting file is not modified
> and the same thing happens if i use notepad (not only "edit")

You are punishing yourself by using a DOS program (edit)
on an NTFS volume with an advanced NTFS command
(fsutil). When you use edit then it destroys part of the link
and you have to rebuild it. Stop using edit - there is no reason
at all for having it!