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.
Alexander
Have phun,
bit