Re: server-side-copy: seems not to get used

"Stefan G. Weichinger via samba" <[email protected]> Tue, 24 Mar 2026 15:10:18 +0100
Newsgroups gmane.network.samba.general
Message-ID <[email protected]>
Figured out to wireshark within the VPN tunnel.

As far as I see it does do that COPYCHUNK thing. I am unsure how to 
share that capture.

This is the beginning of a scopy process

192.168.113.3 .. smbclient
192.168.100.4 .. samba server




No.	Time	Source	Destination	Protocol	Length	Info
53	12.156307375	192.168.113.3	192.168.100.4	SMB2	184	Create Request, 
File: bu19.pcap
54	12.202903593	192.168.100.4	192.168.113.3	SMB2	196	Create Response, 
File: bu19.pcap
55	12.203220640	192.168.113.3	192.168.100.4	SMB2	165	Ioctl Request 
FSCTL_SRV_REQUEST_RESUME_KEY
56	12.246527337	192.168.100.4	192.168.113.3	SMB2	188	Ioctl Response 
FSCTL_SRV_REQUEST_RESUME_KEY
57	12.246839064	192.168.113.3	192.168.100.4	SMB2	580	Ioctl Request 
FSCTL_SRV_COPYCHUNK_WRITE
58	12.330290567	192.168.100.4	192.168.113.3	TCP	40	445 → 43890 [ACK] 
Seq=4138 Ack=3610 Win=62592 Len=0
59	12.332203548	192.168.100.4	192.168.113.3	SMB2	168	Ioctl Response 
FSCTL_SRV_COPYCHUNK_WRITE
60	12.332421688	192.168.113.3	192.168.100.4	SMB2	580	Ioctl Request 
FSCTL_SRV_COPYCHUNK_WRITE
61	12.375554157	192.168.100.4	192.168.113.3	TCP	40	445 → 43890 [ACK] 
Seq=4266 Ack=4150 Win=62080 Len=0
62	12.394330166	192.168.100.4	192.168.113.3	SMB2	168	Ioctl Response 
FSCTL_SRV_COPYCHUNK_WRITE
63	12.394672460	192.168.113.3	192.168.100.4	SMB2	580	Ioctl Request 
FSCTL_SRV_COPYCHUNK_WRITE


this response-request goes on and on ...



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