http://www.franken-online.de/ymmv/esdi/ccards.html is a good summary of what was available. It happens I've been documenting my card collection recently so there are some pictures of boards that he didn't review. I don't currently have a list of all of them on line.
Unfortunately, the prices of AT disk controllers on eBay has been going through the roof lately, and there aren't any listed for a few vendors like SMS/OMTI
You also need to be REALLY careful buying boards on eBay. I've seen a number of listings that have the wrong drive type listed for the board.
The part numbers might be off by one letter or number from what they claim it is.
They also get MFM vs ESDI mixed up as you found out
https://www.ebay.com/itm/274704477562 is NOT an MFM drive
People get confused because ESDI used the same 34/20 pin connector pair as ST-412(MFM/RLL) drives
pretty much any "MFM" drive with more than 100mbytes is an ESDI drive.
the largest MFM drive ever made was the Maxtor 2190. CDC/Seagate never made an MFM drive that big
the manual can be found at
http://bitsavers.org/pdf/cdc/discs/w...tion_Aug87.pdf
I'm pretty sure it is a 10mbit/sec drive given it is a first generation ESDI drive, which should work with most controllers
On the good side, CDC/MPI/Seagate Wren drives are very quiet and reliable. Seagate made a smart move buying them.
Seagate's product line was junk by comparison.
ESDI didn't last very long. Vendors moved to putting the host controller directly on the drive (IDE) or to SCSI. SCSI had the
advantage you just accessed it as logical blocks, so they could change the number of sectors/cylinder and get more capacity.
You couldn't do that with IDE until they went from C/H/S to logical block format, or they lied about the actual C/H/S value
and mapped C/H/S numbers inside the drive to where it really was on the disk.