Have you already checked these ?
With these settings it should work:
Mask = 0x7ffffffe
MaxTransfer = 0x1fe00
Blocksize = 512
x303

YEAH MAN!!!! that worked it out!!! :uzi:GURU
don't know why, but i could format the drive and then i fiddled around with mask and maxtransfer... finally i got both set to 0x7FFFFFFF what doesn't make problems (yet)
i even can SFSformat again with my new settings - strange!
now with the mask set to chip/24-bit ram only the drive is really slow and i also got a guru once at unlzx, so i thinmk it can handle the NEW full mask alright.
as wih the maxtransfer i'm not sure, but hostadapter manual says 0x7FFFFFFF. SFS says the same, maxtransfer and mask is for fixing bad devices... so now you fixed it

with ExpertPrep from GVP i checked also the automatic settings which are DMA 0xFFFFFFFE and MaxT 0x7FFFFFFF, quite the same i've set it to. SFS.guide says always try hard to reach 0xFFFFFFFF for DMA/Mask
let's see if it runs stable the next few days...
would MaxTransfer give a speed drain if set too low??
alright again thank you all guys! especially the crack from the netherlands!
settings now:
Mask = 0x7FFFFFFF
MaxTransfer = 0x7FFFFFFF
Blocksize = 512
best regards
jc