Some number of knowledge and recommendation exchange sites has been visited. Tips found either cover altogether wide range of situations or in particular deviate from situation here. In latter case in result unsure how well can transfer (those found) to goals set here.
We look for compound USB enclosure + internal SSD, which will match Catalina and iMac late 2013 in best possible way (from read/write performance perspective).
In general the trial was made to find components which will satisfy current situation as well as will secure direct successor of system in production currently, let say next 10 years. We didn't succeed on it (to find reasonable compound which convince us). Hence the plan was modified. Currently we aim to find solution to satisfy just current situation which may be valid up to next 3 years (or so).
Below the corner points (goal and current situation).
* use-case: cloning Catalina (in operation and use on iMac 27 late 2013) to USB storage (Carbon Copy Cloner)
* Proved to boot properly on iMac this type
* Proved to show satisfying compatibility with iMac this type
* As for whole chain of components (SSD, US receptacle-type adapters (if any), PCIe interface, USB, host) it is the USB interface only which is accepted to act as chain's bottle neck
* Remaining components accepted to surpass bandwidth of USB in use however it is aimed to keep the performance reserve as minimal as reasonable/possible
* It's fine for those components meant in point one above to show more performance reserve than the possible minimum if costs are same or less than possible minimum
* Among all candidates the best cost-efficiency
* No desire to use along with this iMac successor in our productive environment, neither in parts nor completely
* Should current setup get one day a replacement new plan and investment will undertake
* As for this setup the tendency is to make no use of Hackintosh, OpenCore or similar
* If it matters the internal system drive is iMac factory-original SSD
We look for compound USB enclosure + internal SSD, which will match Catalina and iMac late 2013 in best possible way (from read/write performance perspective).
In general the trial was made to find components which will satisfy current situation as well as will secure direct successor of system in production currently, let say next 10 years. We didn't succeed on it (to find reasonable compound which convince us). Hence the plan was modified. Currently we aim to find solution to satisfy just current situation which may be valid up to next 3 years (or so).
Below the corner points (goal and current situation).
* use-case: cloning Catalina (in operation and use on iMac 27 late 2013) to USB storage (Carbon Copy Cloner)
* Proved to boot properly on iMac this type
* Proved to show satisfying compatibility with iMac this type
* As for whole chain of components (SSD, US receptacle-type adapters (if any), PCIe interface, USB, host) it is the USB interface only which is accepted to act as chain's bottle neck
* Remaining components accepted to surpass bandwidth of USB in use however it is aimed to keep the performance reserve as minimal as reasonable/possible
* It's fine for those components meant in point one above to show more performance reserve than the possible minimum if costs are same or less than possible minimum
* Among all candidates the best cost-efficiency
* No desire to use along with this iMac successor in our productive environment, neither in parts nor completely
* Should current setup get one day a replacement new plan and investment will undertake
* As for this setup the tendency is to make no use of Hackintosh, OpenCore or similar
* If it matters the internal system drive is iMac factory-original SSD
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