>
>>Any performance gained using a PCI mboard and PCI disk controller
>>verses an EISA system with lets say Adaptec 1742's and 1740's
>>And included in this mix, three disk controllers 18 to 21 SCSI-2 drives, 
>>boxes of SIMMS ?
>
>Bottom line is that either one will do the job, since both will give
>you busmaster with 32-bit addressing and burst mode.  If you are going
>to saturate each controller that heavily, though, PCI will probably
>give you small performance boost over EISA.  Neither will completely
>saturate the bus however (3 * 10MB/s (SCSI2) < 33MB/s (EISA)),
>although PCI will have more headroom (133MB/s).  You might also think
>about going wide SCSI if you're going with that many drives per
>controller.  In that case PCI would be a definite advantage (3 *
>20MB/s (SCSI2-Wide) > 33MB/s (EISA) < 133MB/s (PCI)).
>
This is all nice and accurate (but unattainable), but the real reason to
go with PCI is because its new and accepted and EISA is old and dying.
Many vendors are developing PCI products, few (if any) are developing 
 EISA products. Since PCI is more widely used, there are more products 
and they're less expensive....and PCI is 4X faster.

Dennis
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