SupraDrive 500XP setup problem

[Tenacious]

Did you buy the latest ROM revision for the SupraDrive XP?  There was someone selling it on this forum a while ago, and on eBay.  Not very expensive and fixes a lot of problems / compatibility.  Do a forum search for the drive name to find those threads.

Last year I set up one of these on a similarly equipped A500 and it worked fine with a 105 MB drive installed (but I had purchased the latest ROM for it some years previously).

Yes, I remember this interface being a bit finicky with the old ROM.  There is no problem booting and accessing with the original 20 MB Seagate?

I would use the same SCSI ID as on the original Seagate.  You do need Termination on the HD.  What jumpers are set on the HD?  Do you always see the 2 MB of FASTRAM?  What jumpers are set on the 500XP?

[Tenacious]

Yes i see extra RAM all the time and there isn't much jumpers on this, except for RAM and power input. I tried almost all SCSI ID numbers, found that ID 7 works best in regard to boot time, but still no HD at startup (early startup menu doesn't show any HDD).

I'm sure you've already looked over this page, http://amiga.resource.cx/exp/supra500xp, about disabling the HD (dip switch 4), automounting FFS volumes only, and so on.