On Aug 5, 2010, at 10:57 PM, Powermac wrote:
Do you need that much storage? I have a couple SE/30's and just used
some 4GB 50 pin (never used) SCSI drives, they are faster then the
built in SCSI BUS as it is.
Yes, indeed so.
The built-in SCSI bus even as far out as the Beige G3 (the last to
offer a built-in SCSI bus) was limited to 5 MB/sec (pre-G3 PPC Macs
offered a 10 MB/sec internal SCSI bus and a 5 MB/sec external SCSI bus).
The throughput capacity of the SCSIDE product (any of them) is
limited to about 40 MB/sec, or 4 to 8 times the throughput capacity
of the built-in SCSI bus.
In my application, within my Beige G3, I was NOT using the built-in
SCSI bus. Rather, I was using a very high-performance extended PCI
card made by Initio, and all my attached SCSI drives were ultra and
wide SCSI (LVD/SE).
The two IDE channels on my Beige G3 (I had intentionally installed a
Rev. A ROM in my Rev. C Beige, as I only needed two IDE devices) were
two DVD burners. The system residence device was a 68 GB 10,000 rpm
drive (LVD/SE). The data devices were various large capacity 7,200
rpm PATA drives with ACARD SCSIDE adapters (LVD/SE).
As might be expected, this Beige G3 was employed primarily for DVD
authoring and mastering, a job which quickly migrated from the Beige
(500 MHz, later 1000 MHz, through upgraded processor cards, but with
a 66MHz bus) to a Smurf G3 (with its 100 MHz bus), to several Digital
Audios (with their 133 MHz buses) to several Shuttle SP35 OSx86
Hackintoshes (with their 800 MHz buses), and beyond to a Gigabyte GA-
P55-UD2 OSx86 Hackintosh (with its 1333 MHz bus).
In certain applications, there is NO substitute for raw processor
power, and a performance comparison of identical operations shows the
Digital Audios taking about 120 minutes to author/master a DVD,
whereas the Shuttle SP35 OSx86 Hackintoshes could do the same author/
master job in 12 minutes.
The system software on the Digital Audios was, variously, Tiger
10.4.11 and Leo 10.5.8. The system software on the Hackintoshes was,
variously, Leo 10.5.8 and Snow Leo 10.6.4.
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