If memory serves, RAID-0 offers improved performance only on a PPC, not a 68K... I believe it deals with the CPU performance hit associated with splitting / merging the data. The 68K machines are really limited in their ability to move data. The more CPU power, the faster you can move the data. The 8100 internal SCSI is a 10 Mb/s bus (or at least the controller is). My 9600 has a 4 drive (10K RPM) SoftRAID RAID-0 array running on a PCI UW card which achieves around 30 MB/sec (again if memory serves, it has been some time since I benchmarked it).
As an example of using a single really fast drive internally : Q-950, System 7.5.5, Quantum Rushmore 128MB SSD (converted to 8 bit) running on the internal SCSI bus Sustained Read 5099 KB/Sec (5081 Low / 5107 Peak) Sustained Write 4789 KB/Sec (4769 Low / 4797 Peak) Average Access Time 1 ms Average Seek Time 0.0 ms Read Transaction/Sec 1515 Write Transaction/Sec 1333 Tested with HDT BenchTest - I cannot attach the graph showing the transfer test size to the transfer rate, but the next bit will give you an idea. In MacBench 2.0 The same configuration resulted in Disk Mix: 17.41 score Seq Read 1K: 857.73 kilobytes/sec Seq Read 8K: 2143.74 kilobytes/sec Seq Read 16K: 2391.92 kilobytes/sec Seq Read 32K: 4285.51 kilobytes/sec Seq Read 128K: 4710.82 kilobytes/sec Random Read 1K: 504.16 kilobytes/sec Random Read 8K: 1789.29 kilobytes/sec Random Read 16K: 2178.32 kilobytes/sec Random Read 32K: 4079.57 kilobytes/sec Random Read 128K: 4794.25 kilobytes/sec Seq Write 1K: 1612.99 kilobytes/sec Seq Write 8K: 2028.97 kilobytes/sec Seq Write 16K: 2081.44 kilobytes/sec Seq Write 32K: 3835.38 kilobytes/sec Seq Write 128K: 4373.52 kilobytes/sec Random Write 1K: 677.21 kilobytes/sec Random Write 8K: 1633.49 kilobytes/sec Random Write 16K: 1859.42 kilobytes/sec Random Write 32K: 3679.36 kilobytes/sec Random Write 128K: 4446.01 kilobytes/sec I should test one of these out in my 9600... See how fast it can go! For some reason, I just cannot get one of these working in my IIci on the internal bus (works fine with a NuBus card). So far, it works fine in the IIfx, but now I am trying to deal with the video card issue... Sometimes these old machines are such a pain! Derek On Jul 26, 2011, at 7:41 PM, Gregg Eshelman wrote: > One way to improve performance on the built in SCSI is with software RAID 0 > striping. FWB Hard Disk Toolkit could do it. Apple had their own software > RAID but I think it was PPC only. It works best when all the drives are > identical. One slow drive can drag the whole array down to its speed. I was > able to get a 4 drive aray doing a solid 5 megabyte/second on the internal > SCSI on a Radius 81/110 - after replacing the one drive that couldn't top 1 > meg/sec by itself. -- ----- You received this message because you are a member of the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to vintage-macs@googlegroups.com To leave this group, send email to vintage-macs+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/
