Problems with A2090a and a SCSI disk

[Jagabot]

I think this link will help you a lot.

2090a guide

Hope it works out for ya (if it doesn't, consider picking up a 2091 controller off eBay, they sell for peanuts there usually).

[Jagabot]

MFM / RLL were the only two types of drives you could buy "back in the day" (and your scsi is MFM I think).

The two values for MFM/RLL were 17 or 24.

That being said, I would have to guess the value you want to use is 17.

(This is all from memory). But I'm pretty sure the only two values you would ever enter in the Sectors Per Track field were 17 or 24.