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With SCSI hard disks there are a couple more settings:
6\QF7UDQVIHU(QDEOHG'LVDEOHG
The SCSI-bus knows two methods of data transfer: asynchronous and synchronous transfer.
Each SCSI device must be able to perform the first type of transfer, the second one is op-
tional. The advantage of the synchronous transfer consists in a higher data transfer rate,
since the signal transfer times on the possibly long SCSI-cable have no influence on the
transfer rate anymore. Two SCSI-bus participants which want to exchange data between
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