Robocopy Long File Name Support
Get-ChildItem -recurse.PowerShellScripts Select -Expand FullnameThe infamous PathTooLongException that occurs when you hit the 260 character limit on a fully qualified path. Seeing this message means heartburn because now we are unable to get a good idea on just how many files (and how big those files are) when performing the folder query.A lot of different reasons for what causes this issue are available, such as users that are mapped to a folder deep in the folder structure using a drive letter and then continuing to build more folders and sub-folders underneath each other. I won’t go into the technical reason for this issue, but you can find one conversation that talks about it.
What I a going to do is show you how to get around this issue and see all of the folders and files as well as giving you a total size of a given folder.So how do we accomplish this feat? The answer lies in a freely available (and already installed) piece of software called robocopy.exe. Because robocopy is not a windows specific utility, it does not adhere to the 260 character limit (unless you want to using the /256 switch) meaning that you can set it off and it will grab all of the files and folders based on the switches that you use for it.Using some switches in robocopy, we can list all of the files along with the size and last modified time as well as showing the total count and size of all files. Robocopy.PowerShellScripts NULL /L /S /NJH /BYTES /FP /NC /NDL /XJ /TS /R:0 /W:0As you can see, regardless of the total characters in the path, I can easily see all of the data I was hoping to see in my original query now available. So what do the switches do you ask? The table below will explain each switch./LList only – don’t copy, timestamp or delete any files./Scopy Subdirectories, but not empty ones./NJHNo Job Header./BYTESPrint sizes as bytes./FPinclude Full Pathname of files in the output./NCNo Class – don’t log file classes./NDLNo Directory List – don’t log directory names./TSinclude source file Time Stamps in the output./R:0number of Retries on failed copies: default 1 million./W:0Wait time between retries: default is 30 seconds./XJeXclude Junction points.
(normally included by default)I use the /XJ so I do not get caught up in an endless spiral of junction points that eventually result in errors and false data. If running a scan against folders that might be using mount points, it would be a good idea to use Win32Volume to get the paths to those mount points.
Something like this would work and you can then use Caption as the source path. $drives = Get-WMIObject -Class Win32Volume -Filter 'NOT Caption LIKE '%' Select Caption, LabelThere is also /MaxAge and /MinAge where you can specify n number of days to filter based on the LastWriteTime of a file.This is great and all, but the output is just a collection of strings and not really a usable object that can be sorted or filtered with PowerShell. For this, I use regular expressions to parse out the size in bytes, lastwritetime and full path to the file. The end result is something like this. When copying huge files I encountered errors like The files are used by system and cannot be copied. Some errors were like File path name too long, and other frustrating errors. After searching a lot on the internet I found that GS Richcopy 360 works best and provides solution to all my problems.
Some of my favorite features include long path name support which is necessary when copying huge files, copying locked files, multi threaded file transfer for fast transfer speed, pre scheduled file transfer, email notification when task is done and many more.Try it its the best till now! It looks like you are hacking something! LOLBut why to complicate things. When there are already software available in the market then why to do it yourself. After searching a lot and trying many software I found that GS Richcopy works best among them. Some of my favorite features include long path name support which is really important when copying large files, 100% multi threaded file transfer (as the company claims, you can witness the boost in transfer speed yourself), pre scheduled file transfer, email notification when the transfer is done, NTFS support, and many more exciting features.
Try it instead of reinventing the wheel! Thanks for the script. It looks to be doing exactly what I want, if I can get it to run through all the files on my server. I’m dealing with an estimated 30 million files. Not surprisingly, trying to set the output to an object didn’t work (I let it run for 5 days). What I am surprised by is when only selected the fullname property and redirected output to a text file it did about 2.5 million files in half an hour and then ground to a halt and only did a few hundred thousand the hours after that. Any idea how I can capture that full path info for 30 million files I can work with?
Robocopy Long Path Names
I read this post about a year ago and have since started using Robocopy as my go-to way to list directory information and its been great However i just recently ran into a strange issue. I work in an office environment and i am preparing for some big changes. One thing i wanted to take care of is files and folders with a path that is too long. I wrote a script that gathers the path information with Robocopy and then checks the length of each path and reports it if its beyond the bounds i set. All good so far.
I then decided to modify the script to do some basic trimming on the files, like removing double spaces and abbreviating commonly used words. What i discovered was that if there was an oddball character in the path, Robocopy would not correctly report the character. One example i can site from this experience is the copyright symbol ©.
A user has managed to create a folder with © in the name. First off I’m surprised Microsoft allows this. Secondly Robocopy simply reports it as a lower case c. This is a problem when i go to use the Robocopy output later to modify anything under that folder.
I get a “Path not found” error. Not to mention the fact that i would like to now get a report on non standard characters being used in file and folder names! Users always come up with the strangest things!
Anyway, i love your posts, keep ’em coming! This script is great. Any idea on how I can use this to compare directories to see if they are the same? I have another script that uses Robocopy to copy files for backup purposes. Although my script checks the error code of Robocopy for problems, I wanted to use your script to double-check and make sure that the source and destination directory contents are really the same. I tried using your script with compare-object, but the output doesn’t look right. I was thinking of just looping through the files and comparing file names, but that doesn’t seem very efficient.
Thanks for the comment and links.Those are some great links with excellent information in them. I admit that I didn’t do a lot of searching prior to writing my script as I was short on time.Unfortunately, some of those are 3rd party utilities (such as the robocopy clone) which sometimes cannot be used by everyone due to work requirements and the other examples do not quite meet the requirements of what I was setting out to do which was to include the bytes of each file. The text parsing really wasn’t that difficult because I had already had the switches required in robocopy to only give me what I needed to create the object without much loss to performance.
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