bit wrote:
Am Samstag 01 Mai 2004 01:18 schrieb Alexander Dalloz:
>Am Sa, den 01.05.2004 schrieb Guolin Cheng um 00:51:
>
>
>>Hi, William,
>>
>> Thanks.
>>
>> Then how to increase PCI IDE disk speed through adjusting PCI bus
>>speed? What I've said is: even I tried to improve PCI bus speed by
>>specifying "idebus=66", the sustainable PCI IDE disk data transfer
speed
>>is still about 33MB/s, while the hard disks themselves may be capable of
>>providing higher speed. Thanks.
>>
>>I definitely know apple and orange, both fruits are my favorite. :)
>>
>>Guolin Cheng
>>
>>
>Do not play with idebus=XX setting, it's pointless. Instead run "hdparm
>-i /dev/hdX" where X is the drive letter. It will print with which mode
>and at which speed rate the drive actually works:
>
> PIO modes: pio0 pio1 pio2 pio3 pio4
> DMA modes: mdma0 mdma1 mdma2
> UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
>
>This example shows the drive is capable or PIO mode, DMA modes and UDMA
>modes. And it shows that the current mode and speed is UDMA5.
>
>
>
Using "hdparm -i /dev/hdX", I found out, that both of my hard drives run in
udma2, while they are capable of udma5.
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5
AdvancedPM=yes: disabled (255) WriteCache=enabled
Drive conforms to: ATA/ATAPI-5 T13 1321D revision 1:
I didn't investigat this any further, apart from reading the hdparm man pages,
but is it advisable to change from udma2 to udma5 in a completely installed
and configured OS generally (or FC1 in special) ?
Sorry for hijacking the thread, but I felt it was kinda "apropriate". :-)
Thanks for any help.
What are you using for a drive cable? UDMA/cable select, or the old 40
pin cable?
the 80 trace cable must be used for the higher speeds.
What is the controller you are using? I assume ultra, but need to be sure.
What is the BIOS setting?. If not set to ultra it will not work any faster.
>Alexander
>
>
Have phun,
bit