To attain higher data bandwidth (twice that of a 16 bit SCSI drive) Dual channel SCSI Cards are used to form a 32 bit data path. Two or more 16-bit drives can be configured internally or externally (housed in an enclosure) to deliver twice the bandwidth of 16 bit SCSI drives. The illustration below explains the concept of a dual channel SCSI configuration.

Notes: [VHDCI] Connector: [Very high density cable Interconnect] [Internal Configuration] Most computer chassis allows only two drives to be installed internally. Also limitation of the form factor of the drive is also imposed. Power Macintosh Blue & White G3 and G4s allows only 1 inch drives to be installed internally. [External Configuration] External configuration allows multiple drives to be connected. Issues like heat, form factor of the drive and future adaptability are better tackled compared to internal installation. Several other important factors like cabling, drive performance parameters and card compatibility will be posted latter. please check back for more information on these topics.

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