How to move sparse file maintening the real sparse dimensions

einstein1969 · 23 Jul 2020

Hi everyone,

I need to move "sparse" files from one disk to another. Both ntfs obviously.

I want the size occupied on the target disk to be the same as the source disk. So not the final dimension but the "sparse" dimension.

How can I solve it?

EDIT: I would like to make a script to move only files from a certain maximum size down.

Caledon Ken · 23 Jul 2020

Have you looked in Robocopy?

It has a parameter /MIN:n which excludes files smaller than "n" in size.

or /MAX:n which excludes files larger than "n"

Not sure about how it handles Sparse files, you could experiment.

hsehestedt · 23 Jul 2020

@einstein1969,

Unless I'm way off base, my understanding is that if you copy or move a sparse file from one NTFS volume to another NTFS volume, the sparse file will remain a sparse file. Have you actually tried this as a test to see if that is the case?

einstein1969 · 23 Jul 2020

I have tried dos command "move", "robocopy", "CS.exe" command . Nothing of this work.

This is the script that have made for my "emule" .part file sparse.

Code:

@echo off & setlocal ENABLEDELAYEDEXPANSION

echo ATTENZIONE se i file esistono li sovrascrive!

pause

rem da fare: log

rem Attenzione: il comando "move" sposta il file e non mantiene il flag sparse!

Echo Sposta i file piccoli

rem 2G , massimo 2^31-1
set "big=2000000000"

rem commentare questo "set" per numeri non big
rem 18G , diviso per 10 , uno zero in meno
set "big2=1800000000"

set "sourcedir=D:\emule_temp\Temp\"

set "destdir=C:\Users\fposc\Downloads\eMule\Temp\"

cd /D "%sourcedir%"

Set /A I=1
for /f "tokens=*" %%A in ('dir *.part /b') do (

	for /f "tokens=3" %%F in ('dir %%A ^|findstr %%A') do set "dim=%%F"

	echo(
	echo(!time! - File %%A , dim: !dim! - [%%~zA] , nome: %%~nA , ext: %%~xA , comp: %%~fA
	echo(

	if defined big2 (
		:: Trick per big num
		set "num=%%~zA"
		set "numn=!num:~0,-1!"
		if !numn! lss %big2% ( 
			echo Sposto:
			dir /b %%A.*
			rem move %%A.* "%destdir%"
                        robocopy . "%destdir%\" %%A.* /J /MOV /MT:1 /BYTES /ETA /NJH /NJS
			:: reimposto lo sparse
			fsutil sparse setflag "%destdir%%%A"
			fsutil sparse queryflag "%destdir%%%A"
			echo(
			choice /T 8 /C SN /D S /M "Vuoi continuare con il prossimo file? Hai 8 secondi per decidere [Predefinito S]:"
			if errorlevel 2 ( echo Interrompo. & pause & exit/b )
		)
	) else (

		if %%~zA lss %big% (
			echo Sposto:
			dir /b %%A.*
			move %%A.* %destdir%
			:: reimposto lo sparse
			fsutil sparse setflag "%destdir%%%A"
			fsutil sparse queryflag "%destdir%%%A"
			echo(
			choice /T 8 /C SN /D S /M "Vuoi continuare con il prossimo file? Hai 8 secondi per decidere [Predefinito S]:"
			if errorlevel 2 ( echo Interrompo. & pause & exit/b )

		)
	)
)
pause
exit/b

But not work. It mark a file sparse but after move.