no_gnome at tpg.com.au
Sun Dec 29 01:38:05 CST 2002
hdparm will not let you push the speed higher than the drive tells
hdparm it can do.
hdparm -i /dev/#drive# will tell information from the drive, if your
drive is 66MHz = udma4 / 100MHz = udma5 / 133MHz = udma6
Depending on your system you can set maximum DMA while configuring your
IDE, ATA and ATAPI Block devices
Generic PCI bus-master DMA support = Yes
Use PCI DMA by default when available = Yes
and by compiling the kernel you would need to worry about adding extra
bits to your kernel at boot.
@@ WARNING @@
If you have flakey/cheap hardware there is a very small possibility of
data or hardware damage, plus you should get someone to show you how to
compile the kernel or do a lot of reading before hand.
Once you have learnt to customize the kernel, you have come one big step
closer to becomimg a linux hacker.
By the way if you PCI bus is 32bit it should set to 33MHz if 64bit set
On Thu, 2002-12-26 at 22:32, Luke wrote:
> pushing ideX=ata66 to kernel means
> setting udma4 ?? (accorging to hdparm yes)
> if so,...
> is that dangerous ??, cos it works fine.
> Another story is idebus=xx,
> xx works fine for me with 33, 47, but with
> 66 (Mhz) i get message from
> VP_IDE user given PCI clocl speed (66000) imposible, using 33000 istead...
> and this is not true, i know that my machine can do 66Mhz.
> Help :)
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