While snooping around the stock init script, I spotted a variable, home, in the mountdata function standing out from the crowd. After doing some quick tests, the preliminary results are summarised as follows,
Prerequisite: The persistent overlay (.img, .aes or .inf) being on the same partition as the KNOPPIX file.
Functionality: Loading a specific persistent overlay at the boot time.
Usage: knoppix home=/mnt-system/foobar/dummy
*The dirname and basename cannot contain any whitespace characters.
*The basename needs to be unique if there are more than one overlay files in the same folder because the suffix cannot be part of the argument.
Dell PowerEdge R720 Server - 2x8c CPU,256Gb RAM, 128Gb SSD/3x900Gb SAS, Proxmox
$340.00
DELL PowerEdge R730 Server 2x E5-2690v3 2.6GHz =24 Cores 32GB H730 4xRJ45
$274.00
Dell PowerEdge R720XD Xeon E5-2680 V2 2.8GHz 20 Cores 256GB RAM 12x4TB
$510.00
Dell PowerEdge R620 Server 2x E5-2660 v1 2.2GHz 16 Cores 256GB RAM 2x 300GB HDD
$79.19
Dell PowerEdge R730XD 28 Core Server 2X Xeon E5-2680 V4 H730 128GB RAM No HDD
$389.99
Dell Emc R750 Computer Poweredge edge racked server.
$750.00
Dell PowerEdge R730, 2 sinks, SystemBoard, 8 trays,H330,Idrac 8 exp, 2x750w Psu
$135.00
Dell PowerEdge R730 Server 2x E5-2670v3 2.30Ghz 24-Core 128GB H730
$411.75
Dell PowerEdge R720 Server | 2x E5-2660 2.2GHz | 128GB Ram | 1.2TB HDD | H710P
$179.00
DELL PowerEdge R630 8SFF Server 2x E5-2680v3 2.5GHz =24 Cores 128GB H730 4xRJ45
$360.00