D90 hard drives
I realize this is an old post, but want to add the following for reference...
Check on eBay for older IDE drives. I purchased several a few years ago (new old stock) and they work fine. I even found generic carriers, which worked fine except they protruded a little too far in the front, so the control panel can't be mounted on front of the machine when using them...not a real problem for me since I use the panels detached with an extension cable.
This gave me at least two drives for each D90. The idea was to not have to back-up to a SCSI drive and make it easier to work on different projects by just switching drives.
p.s. Don't forget to format the new drives...