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CHAPTER 4
THE ULTRA WIDE SCSI DMA CONTROLLER
The integrated on-board Ultra Wide SCSI controller with a maximum transfer rate of 40 MByte/sec
on the SCSI bus offers enormous performance reserves with todays fast storage media, especial-
ly the fast harddrives which are available for desktop systems. Applications which are depending
on fast access to largest amounts of data can therefore be accelerated significantly. The SCSI con-
troller which is based on the Symbios 53C770 SCSI Sript Processor operates as a DMA busma-
ster device. A standard 68pin Wide SCSI connector is available for the connection of SCSI devi-
ces, to the speed level of Fast SCSI.
The ULTRA WIDE SCSI Controller of the CYBERSTORM MKIII will reach full performance best
when only operated with ULTRA WIDE SCSI units. The following chapter will also describe how to
connect Fast SCSI units, but it is recommended to operate Fast SCSI units on a Fast SCIS Con-
troller if already present in your system. Connection of Fast SCSI units may lower the data trans-
fer rate on the whole SCSI bus.
CONNECTION OF ALREADY RDB FORMATTED SCSI-DRIVES
If you connect a hard disk (or resp. another SCSI unit) to the CYBERSTORM MKIII SCSI, which
was formerly operated on a SCSI controller in the AMIGA and formatted with the RDB (Rigid Disk
Block) according to AMIGA standard, this unit is immediately ready to use.
After the computer has been started, the partitions existing on this disk must be automatically reco-
gnized and, resp. even booted. If this is not so, contact your retailer in any case, before underta-
king further measures.
ATTENTION!
If you want to connect hard disks which you already use on another controller, and on which
data is stored, we urgently recommend to make a safety backup of the hard disk before remo-
val from the old system. Each new connection of an already operated hard disk bears the risk
if ever so small of a data loss because of installation mistakes, or possible malfunctions.
If the backup on floppy disk seems too slow, ask your retailer if he could take over the backup
and re-installation for you (e.g. on a streamer), or if you could borrow a streamer, possibly
against a low fee. We expressively state that we take over no warranty whatsoever for data
losses on hard disks or
SCSI units which have been previously used before being connected to the
CYBERSTORM MKIII SCSI.
Summary of Contents for CYBERSTORM MKIII
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