[X4U] PPC 9600 issue

[Antonino Cuscina']

hi all,
i have a problem with my PPC 9600/OS 9.1 and two firewire hds connected 
to it, that is,
i can't copy files to and from the two firewire and the internal hds, i 
mean can transfer
small files of say 4 kb like aliases but when i try to pass larger ones 
the copy window
stuck and freezes the mac which i have to restart; i can copy files 
through the internal hds
with no problem and the strange thing is that the same error comes also 
when i try to transfer
files from one firewire hd to the second and vice-versa. i thought the 
culprit was the firewire
card so i tried with another card of another brand but the issue is 
still there.
when i bought the first firewire hd, which i didn't reformatted or 
initialise, it worked fine
till remained the last 20gb disk space; then i bought a second one of 
another brand
thinking there was something wrong with the first but unfortunately the 
problem remains.
i also reinstalled a fresh OS 9.1 with no help.

thanks for all coming suggestions.
nez.
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