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
