On 29 Jul, this messageom Rogerio Saran echoed through cyberspace: > Michael, thank you for the corrections.
You're welcome :-) > I have some comments may also be > useful for those considering an old PowerMac as a Debian platform. I hope some are inspired by your comments. I run Woody myself on a 7600/G3/300, and all I can say is it performs beautifully for a 7-year old Computer :-) >> Errmm.. no, the 9x00 series have no 64-bit slots. Those were the >> first-generation PCI machines. You're a generation too far :-). > You are absolutely right, only 32 bit PCI. I am sorry for the imprecise > comment. I got confused because for most high performance peripherals is > recommended to use slots 1 and 4. These are the first on each of the > 9500 PCI buses, and ensure better throughput (I do not know the reason.) Maybe arbitration? Although I thought I remebered reading that all PCI devices share equal arbitration priorities (with the exception of GrandCentral)... >>>Just add a good SCSI card (Ultra-2 LVD or Ultra160) and a >>>newer disk to see real (not bus nominal) transfer speeds of 25-40 Mb/s. >> >> Or an IDE card, for that matter. I get close to 15 MB/s on a (now rather >> old) 10 Gig Maxtor 7200 rpm disk with a Promise Ultra/66. > > You are right. I did not mention IDE because it usually blocks the > system for too much time during disk operations. > > I have no experience with IDE on PowerMacs, but on PCs a single > large-file copy is a sure way to slow down the system to a crawl. This > is not a problem on most workstations, but for a server with more then > minimal traffic it may be a real concern. Yeah, I get the 'freezes' a lot on my TiBook (which is obviously IDE...). It's worst at disk wake-up time, but that's kind of expected. Reads or writes of large blocks also cause the same symptom... > Of course those who can afford Ultra2 or Ultra160 mirrored-controller > striped-disk systems will experience stunning results for any kind of > disk usage. I have some experience with Ultra160 on a Dell server (1 Gig PIII; nothing fancy...); its 'perceived' performance is rather fabulous compared to similar CPU desktop systems. > I sounds like madness, but an 9500 can handle mirrored controllers on > its dual PCI buses. Some performance addicted have tried 4-disk setups > where each controller handle a striped volume set with stunning results! Cool :-) > I am trying to reach these performance levels on my 8500, but I am still > doing reserch on Linux (Debian) compatible hardware. Try to get a controller that will do 'Memory Write and Invalidate' and 'Memory Read Multiple' DMA transfers over the PCI bus; those will give you maximum performance. No idea though which ones will indeed support those... Maybe have a look at the driver source codes. Cheers Michel ------------------------------------------------------------------------- Michel Lanners | " Read Philosophy. Study Art. 23, Rue Paul Henkes | Ask Questions. Make Mistakes. L-1710 Luxembourg | email [EMAIL PROTECTED] | http://www.cpu.lu/~mlan | Learn Always. " -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]