Messages in this thread |  | | From | Marek Michalkiewicz <> | Subject | ALI1489 IDE driver | Date | Tue, 6 Aug 1996 00:31:27 +0200 (MET DST) |
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Hi,
I noticed that the recent kernels have support for the ALI 1487/9 chipset in the IDE driver. Now I'm just wondering - I have a GigaByte GA-5486AL motherboard with this chipset and AMD 5x86-160 CPU, and it works just fine with both the standard IDE driver, and 2.0.10 with ALI support enabled. I don't see any real speed difference (except that the ALI support made it about two times _slower_ in the older kernels). Are there any reasons why I should be using the kernel with ALI 14xx support enabled? (The DOS driver doesn't make a big difference under DOS either, so I don't use it.)
My disk is WDC AC2850F, using PIO mode 3, hdparm -m16, no unmasking (no high speed serial I/O). hdparm -t /dev/hda reports about 3.9 MB/s "raw driver speed", which isn't bad for a drive which is about a year old.
Also, 2.0.11 has the bus speed parameter. Allowed values are from 25 to 66 - but I suspect that with the CPU running externally at 40MHz, the PCI bus is running at only 20MHz (40 would be too fast for the PCI specs). Perhaps the minimum value should be 20? (Haven't tried 2.0.11 yet.)
Marek
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