I have a linux system with two 3T EXT4 formatted data hard drives in addition to a system SSD. They are not formally raided, I just rsync from one to the other from time to time to keep two copies of backups
I'd like to move one of them out to remove the obvious possible single point of failure, but I don't want to buy another machine to host it. A USB-SATA dock would be inexpensive, and have other useful attributes as well. No, I don't think I need a small NAS box at the moment.
Looking at the documentation for various docks, I see nothing about the disc formats they can handle. From this, I infer that they are transparent, and that the disc format, whether FATx, NTFS or EXTx is just a matter for the OS and the HD to negotiate, and that the USB and dock will work regardless. However, my history of making software compatibility assumptions like this has not been happy.
Is my assumption correct, and if so, do some docks work and others not? Is there any code word in the documentation that would tell me?