Iomega Bernoulli Box 20+20 (A220H)

It's alive! For those of you who don't recall a thread from six months ago, I was trying to get an old Bernoulli Box running again. This was a Model A220 - two 20MB 8" drives in an enclosure. I finally found somebody with cartridges that I could purchase and was able to get it going. Some things I learned along the way .. - The head cleaning kit is essential. The drive was ridiculously flakey until after five or six sessions with the cleaning cartridge, which basically lets you wipe a giant wet pad on the head by manipulating a lever through the cleaning cartridge. (Strictly a manual operation - they don't want you to get that cartridge loaded and start spinning it at 1500 RPM.) - The 20MB drives will read 10MB cartridges, but not write to them. - A stock XT can run with the cartridges having an interleave of 4. That gives you about a 120KB/sec data transfer rate. - The Iomega controller supports DMA and PIO modes. The PIO mode is pitifully slow. I won't mention the number here it is so bad. - The Iomega controller has an optional ROM that can boot the machine from the drive, but in read only mode only. To be able to write or do anything else you need to have a device driver loaded. The drive is truly marvelous to hear in action, and it's the most interesting drive I have in the house now. I'm finally happy that I got it working, although it's cost too much @#$#@ money. (The cartridges weren't cheap, nor were the controller cards, cleaning kit, etc.) If anybody has 20MB 8" cartridges or knows of a source, I'm still looking. There are some on ePay now for price that makes me visibly wince and consider playing with click-of-death Zip drives instead. (I'm looking for something a little more reasonable.) Mike