Work out samba share throughput instantly with clear inputs, formula shown and shareable results.
SMB 1 was chatty and synchronous, achieving under half of link rate; SMB 2 introduced compound requests and credit-based flow control; SMB 3 adds multichannel, which genuinely aggregates several network paths. Small files remain the killer regardless of version, because per-file open, query and close round trips dominate the transfer.
SMB throughput
throughput = link rate x usable channels x protocol efficiency x small-file penalty; multichannel applies only to SMB 3
Legacy devices such as old scanners and embedded systems. It should be disabled everywhere possible, since it carries the WannaCry-class vulnerabilities and has no security features.
It negotiates automatically when both ends support SMB 3 and multiple interfaces or RSS-capable NICs are present. Verify with Get-SmbMultichannelConnection on the client side.