sftp stops at 2GB

Posts: 6 · Schneckii 30 Jun 2019, 06:18

Hi!

I want to use the FreeFileSync to syncronize a Windows 10 32bit directory to an sftp location. I'm using 10.13 Build 13.06.2019 Unicode x86. Small files are no problem, but if I want to transfer files > 2GB the transfer stops at 2.077.588 with this error message: LIBSSH2_ERROR_OUT_OF_BOUNDARY: Unable to send FXP_OPEN* [libssh2_sftp_open]

Using google I found several articles stating that (s)ftp from a 32 bit client has a 2GB limit. Is this correct for FreeFileSync?

If its not correct, what can I do?

Best regards

Posts: 6 · Schneckii 30 Jun 2019, 08:27

Hi

Meanwhile i tried the same from an 64bit client. The problem is the same.

I can upload several hundred files over tens of minutes if they are smaller than 2Gb

Best regards

Posts: 6 · Schneckii 2 Jul 2019, 06:28

Maybe it helps to find a solution: The counterpart is a iomega ix2 NAS system with firmware 4.1.312.34560.
If I connect using command line ftp I get these messages: 220 ProFTPD 1.3.5 Server (Storage) [x.x.x.x], 200 UTF8 set to on

Posts: 7285 · Zenju 2 Jul 2019, 18:52

if I want to transfer files > 2GB the transfer stops at 2.077.588 Schneckii, 30 Jun 2019, 06:18

You mean the error is shown after transferring 2 MB of a 2 GB file?

Using google I found several articles stating that (s)ftp from a 32 bit client has a 2GB limit. Is this correct for FreeFileSync? Schneckii, 30 Jun 2019, 06:18

No, this limit is regarding the maximum address space and has nothing to do with file sizes during SFTP upload.

Posts: 6 · Schneckii 3 Jul 2019, 05:46

It is ~2Gb. Windows explorer shows alway 2.077.588 bytes

Posts: 6 · Schneckii 3 Jul 2019, 06:14

Sorry, of course 2.077.588 KB :-)

Posts: 6 · Schneckii 3 Jul 2019, 06:36

The file sizes to transfer are 20GBb to 200GB

Posts: 7285 · Zenju 3 Jul 2019, 11:38

Ilibssh2_sftp_open is called at the beginnig of the file transfer. I don't understand how this could be related to an error after 2 GB were already transfered.