>Just what is this "ultra 160" stuff anyway?
>Is this something new?
>How fast can we get our 7500s etc. to perform with these drives?
>Are they good for video editing?
>Anybody with experience & advice?

According to MacGurus SCSI Pages of Doom, and in contrary to what the 
other responses to your question have been, Ultra160 is *not* the 
best option on your PowerMac 7500.  For you, dual-channel Ultra2 Wide 
(80MB/sec) is about the max.

This is because the PM 7500 only has a 32-bit PCI bus, whereas true 
Ultra160 performance requires a 64-bit PCI bus only found on New 
World Macs (and even then, only one of the PCI slots is usually 
64-bit, the bus mastering one).

The complete story is a bit unclear on the MacGurus site, so if 
someone would care to correct me or fill us in with the details, that 
would be great.

In the case of my uber-fast SCSI experiment, the drives (two new as 
in never opened 4.3 GB Ultra Wide 7200 RPM Seagate Barracudas) 
arrived yesterday but I'm still waiting on the 80- to 68-pin 
adapters.  I have everything else ready to go, including SoftRAID 
2.2.2 and MacBench 5.0.  I'll fill everyone in when I get the 
adapters (hopefully tomorrow) and everything up and running.  Pray 
for me that the adapters are high enough quality not to cause 
problems --- small native 68-pin drives were just too hard to come by.

-- 
--Chris

PM 7500/604e 200Mhz
4 gig SCSI
256 megs
OS 8.6
(This machine rocks!)

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