On Tuesday 19 August 2003 21:05, Scharf Yuval wrote: > Hello, > > Can someone explain to me the following log messages from the kernel: > > ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx > ICH2: IDE controller on PCI bus 00 dev f9 > ICH2: chipset revision 2 > ICH2: not 100% native mode: will probe irqs later > ide0: BM-DMA at 0xff00-0xff07, BIOS settings: hda:DMA, hdb:pio > ide1: BM-DMA at 0xff08-0xff0f, BIOS settings: hdc:DMA, hdd:DMA > hda: 39102336 sectors (20020 MB) w/512KiB Cache, CHS=2434/255/63, UDMA(100) > > Using `hdparm -t /dev/hda5` I get ~27MB/s. > Does it mean that my bus holds back my HD. > Shouldn't I get 100MB/s? > Can I do something to improve performance.
because I read some stupid answers so this could not be worse but maybe better: IMHO > ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx means ' I detected that the bus, that hosts my ide controller is working at 33 MHZ (speak: PCI-bus). If you would have a isa-ide controller or a vl-bus controller, you would see different MHz. DMA/UDMA33/66/100/133 is something completly different. A harddisk delivering 27mb/sec is reasonable fast, NO harddisk out there is delivering 133/100/66 mb/sec. Only exception: a cachehit, but that is not measured by hdparm.. and cache is very nonsignificant... Gl�ck Auf Volker -- Conclusions In a straight-up fight, the Empire squashes the Federation like a bug. Even with its numerical advantage removed, the Empire would still squash the Federation like a bug. Accept it. -Michael Wong -- [EMAIL PROTECTED] mailing list
