On Tue 23 Jan 23:21, Alan wrote: > > Other people using this device report of read/write speeds constantly > > maxing out their SATA150 or PCI-bus. Is this my sil3114 being the > > bottleneck? Other devices on the PCI-bus? My general system (see link to > > Possibly. 80Mbytes/sec seems to be about all you get from PCI bus with > many machines. Remember the SATA150, UDMA/133 and PCI bus limits are > largely theoretical, especially as most ATA controllers have significant > turn around time between commands and cannot queue. Ah, alright. I'll try to remove the other cards on the PCI-bus to see if that makes a difference, if not; well I guess 80 MB/s isn't that bad :) > > from what I can tell from dmesg (U)DMA should be enabled for this drive. > > I have tried enabling UDMA/133 for the controller (in sata_sil.c), giving this > > output on boot: > > If you are getting 80Mb/sec then UDMA is enabled 8) Good! > > I'm using the old piix-driver (not libata) for the IBM-disk, as I was > > having some problems getting it to work with the libata-driver. I might > > What sort of problems ? I've got an iRAM here for debugging/testing > courtesy of a company using them and the one I have seems to pass all the > testing I've thrown at it. Sorry, I was cramming too much information into that sentence. I was having problems getting the _IBM IDE-disk_, not the i-Ram, working with the ata_piix. I haven't really dug deep into this, but I suspect it's probably something silly like the drive changing identifier (hda -> sda) or something like that. Do you thing this (using the regular piix-driver for the IBM system disk and the sata_sil-driver for the i-Ram) could be causing any performance problems? -- Oddbjørn Kvalsund - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
