re quadra scsi problems tzs stein u washington edu tim smith writes attention mac quadra owners many storage industry experts have concluded that mac quadras suffer from timing irregularities deviating from the standard scsi specification this results in silent corruption of data when used with some devices including ultra modern devices although i will not name the devices since it is not their fault an example would be a sony inch mo without the special mac compatible firmware installed one solution sometimes is to disable blind writes this doesn t sound right to me don t quadras use the c if so the mac has nothing to do with the scsi timing that s all handled by the chip about the only the timing could be wrong is if apple programs the clock registers wrong on the that however should only really hurt synchronous transfer which is not used by the mac scsi manager furthermore disabling blind writes should be meaningless on a quadra on macs that used the which is a much lower level scsi chip the mac was responsible for the handshake of each byte transferred blind mode affected how the mac handled that handshake on the the handshake is entirely handled by the chip the docs say that it s a scsi manager bug if this changes things at all jim jagielski and he s gonna stiff me so i say jim jagubox gsfc nasa gov hey lama how about something nasa gsfc code you know for the effort greenbelt md
