I got a Vortex HDplus 40 off eBay recently, and have just got a DMA cable so I can start using it.
It's a fascinating device.
Internally, it appears to be a standard IDE drive, attached to an ISA card which plugs into the clever host adaptor ACSI board.
I have a 52MB IDE drive waiting for me to bring it home and attempt a replacement. There's space in the housing for a second drive, and with IDE it would be trivial.
Ultimately I'll try replacing the drive with a CF card, but I have no idea if any of this will work... I backed up the vortex utils straight away so I can partition and format... but I don't have much confidence in the SW and it's not AHDI or HDdriver compliant. I hope it will work along side them though...
Stock Falcon030 (4MB TOS 4.02), 2GB SSD, SoundPool SPDIF FDI,
Mega 2 (TOS 1.2), Vortex HDplus 40, AT Speed
4160STe, Sound Master, SatanDisk (TOS 1.62),
520STm, (TOS 1.0 / 2.06), 1024KB, Cumana Dual Floppies
2x 65XE, XEGS, XC12
800XL, 1050 Floppy drive, SIO2PC (USB), XEP80
400 with B-key keyboard, 16KB