My three "non-SSD" Internal sata connected drives in my two MMs all beat my 5 external FW800 driven drives for speed so I guess my FW800 drive controllers are all broken. I hope I can return them after years of wrongly observing their transfer speeds.
That is how my set up physically performs. My internal hard drives in my MMs are all faster than any of my FW800 driven hard drives.
Such is life in the world of hard drives.
I mean this entirely without offence but if 2 of us have shown benchmarks of SSDs vs HDs proving that long transfers/large block size transfers on internal drives are faster than FireWire 800 regardless of whether it's a hard drive or SSD, yet random transfers drop off to 2Mb/s vs 20Mb/s AND you can attest this yourself with the performance of your internal SSD, why the sarcasm about your "broken" FireWire 800 enclosures?
An internal SSD absolutely screams but an external SSD on a FireWire 800 interface will always be faster than an internal hard drive because it's clear that the sustained performance is maybe 20-25% slower if a hard drive is in a firewire 800 enclosure but with an SSD having a 10 fold increase for random transfers over a hard drive, as a boot drive the SSD will always be faster whether it's internal or external.