Fastcopy have problems when copying a large number of files from a network sharing path to a local path.

[boot ly]

●Version Info (principle, latest ver) : v3.92

●OS/Environment : win10

●Error Message / Logs:

●Error Details / Situations: CreateFile(The system cannot find the path specified.3) : C:\c11\xxxxxxx....

●Specified Params : copy-mode / filters / other options 

/open_window  /estimate /error_stop=FALSE  /bufsize=64  /log=FALSE  /disk_mode=auto /speed=9  /auto_close

●Reproduction Steps :

    Suppose there are two paths, one is A, one is B, A is the local disk (Solid state disk), B is a network shared path, for example, is \\Another_PC_ip\sharepath\some_folder\

    Fastcopy does not have problems when copying folders (which contain A large number of files) from path A to path B.

    But FastCopy has problems when copying the same folder from path B to path A. Always report that many files cannot be created.

        CreateFile(The system cannot find the path specified.3) : C:\some_folder\xxxfile

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[SHIROUZU Hiroaki]

Sorry, I can't reproduce.

Please tell me more informations/steps/conditions for reproduction.

2021年10月14日木曜日 10:41:36 UTC+9 lyb...@gmail.com:

[boot ly]

(1). I have a SOLID state disk on my computer and have divided it into two partitions: C and D.

(2). Suppose I have two paths,

    path1 :  d:\d15\

    path2:   \\10.80.42.251\om Shared Folder\info\

    There's a folder under path2 called "bb" that has 21600+ subfolders and 90400+ files. These files are distributed in these subfolders.

(3), Now use FastCopy to copy it, with overwrite-mode.

    Copy  \\10.80.42.251\om Shared Folder\info\bb     to  D :\d15\.

(4), Use FastCopy to copy "bb", using overwrite-mode.

    Copy  d:\d15\bb     to \\10.80.42.251\om Shared Folder\info\

(5) During this process, I will see the following types of errors on my computer many times.

    CreateFile(The system cannot find the path specified.3) ; d:\d15\bb\xxxxfile

    WriteFile(An Unexpected network error occurred.59) \\10.80.42.251\om Shared Folder\info\bb\xxxfile

I think there is a key point:

The folder "bb" should have many and many subfolders and files. In my case, there are more than 20,000 subfolders and more than 90,000 files int it, they taking up about 1 GB of disk space.

[FastCopy support forum]

What is network drive details? (NAS?)

Is destination network drive?  > WriteFile(An Unexpected network error occurred.59) \\10.80.42.251

2021年10月14日木曜日 17:17:16 UTC+9 lyb...@gmail.com:

[boot ly]

I'm not sure if the network drive is NAS.

I just use it.  It was created by someone else or some organization else.

Yes. 

Errors like this occur when the path2 (\\10.80.42.251\om Shared Folder\info\) is used as the destination path.

[FastCopy support forum]

I don't know, but the network drive seems strange.

I recommend to ask your administrator.

And some bad NAS have a bad behavior that FindFirstFileEx API with  FIND_FIRST_EX_LARGE_FETCH option.

So you can try check off the "Enable Large fetch mode" checkbox in I/O settings of FastCopy.

2021年10月15日金曜日 9:59:31 UTC+9 lyb...@gmail.com:

[Tsai Lee]

maybe you should check your network.

CreateFile(The system cannot find the path specified.3) ; d:\d15\bb\xxxxfile

WriteFile(An Unexpected network error occurred.59) \\10.80.42.251\om Shared Folder\info\bb\xxxfile

Any network problems will cause this error. Network drive needs table network environment, you should check your network switches, wires, network card. I suggest you configure network card bonds and LACP configuration in the network switch to avoid the unstable network.  

In my environment,  the source directory is a Network drive, and the destination directory is a Local drive. I use FC to move 3.5TB~4.3TB per day, each file is 70KB~200KB. I think FC software can meet your needs, so I suggest you check your network or source network drive/NAS.