Previous full backup chain transformation failed Error: Agent: Failed to process method {Transform.Patch}: An unexpected network error occurred.

Recently multiple Transform jobs for Veeam on a Synology NAS was maxing out the I/O’s of the NAS , with the errors

Previous full backup chain transformation failed Error: Agent: Failed to process method {Transform.Patch}: An unexpected network error occurred.

applying the below registry keys and spacing out the transform fixed the issue 

 

SessTimeout - Reboot Required

Key: HKLM\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters\
DWORD: SessTimeout
This is a value in seconds. Try a value of 600 decimal (10 minutes).
This increases the amount of time the Windows SMB client will wait for a response from an SMB server before it aborts the connection. The default timeout is one minute.

TcpMaxDataRetransmissions - Reboot Required

Key: HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
DWORD: TcpMaxDataRetransmissions
Try a value of 10.
This increases the number of times the Windows TCP implementation will retransmit a data segment before it aborts the connection. The default number of retries is five.
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Tags: I/O, NAS, Previous full backup chain transformation failed Error: Agent: Failed to process method {Transform.Patch}: An unexpected network error occurred., synology, Transform, veeam

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