Specifications

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, especially 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 controller which is based on the Symbios 53C770 SCSI Sript

Processor operates as a DMA busmaster device. A standard 68pin Wide SCSI connector is

available for the connection of SCSI devices, to the speed level of Fast SCSI.

The ULTRA WIDE SCSI Controller of the CYBERSTORM PPC 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 SCSI Controller if already present in your system. Connection of Fast SCSI units

may lower the data transfer 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 PPC 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

recognized and, resp. even booted. If this is not so, contact your retailer in any case, before

undertaking 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 removal 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 PPC SCSI.

PowerUP - Amiga Goes PowerPC

http://powerup.amigaworld.de