We were able to duplicate this problem with some interesting twists. In our
case, the slower machines were the Macintosh IIx systems with a particular
Macintosh II performing as you would expect. Furthermore, HD80 SC drives also
exhibited these symptoms.
In our tests, we found that the results varied from machine to machine and hard
drive to hard drive, so we have concluded that the problem is not with
particular hardware.
The problem can be resolved by upgrading to EtherTalk 2.0.1. When we did this,
all drives on all machines functioned as expected. We recommend that all
machines (workstations and servers) be upgraded to EtherTalk 2.0.1.