>Also, how can you tell a SCSI 2.5" from an IDE 2.5"
>drive from just looking?

A 2.5" SCSI drive, the first to be developed and marketed in Apple 
products, has a three-section connector totaling 50 pins, with 40 pins in 
the first section, 2 pins missing in the second section, the "key", and 8 
pins in the second section. The host connector spans all 50 pins.

A 2.5" IDE/UATA drive, the second to be developed and in Apple products, 
has a three-section connector also totaling 50 pins, with 44 pins in the 
first section, 2 pins missing in the second section, the "key", and 4 
pins in the second section. Only 44 pins are used by the host, and the 
host connector spans only those 44 pins.

It an IDE/UATA converter is being used, there will be a 50-pin "CROB" 
(cross board) connector between the IDE/UATA drive and the IDE/UATA 
converter, and the IDE/UATA converter will present a SCSI connector image 
to the host.

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  • hdd victoria.duggan
    • Re: hdd Gary D. Adams
    • HDD R. A. Cantrell
    • ACFX44501

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