Messages in this thread | | | Date | Thu, 09 Nov 2006 09:39:53 -0500 | From | Stephen Clark <> | Subject | Re: Abysmal PATA IDE performance |
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Arjan van de Ven wrote:
>>Probably your drives are renamed. >>Before you had (wild guess, look at your boot log messages): >>- ata bus -> hdc,hdd >>- sata -> sda (if you really have any sata bus...) >> >>Now all hdX become sdX, and PATA is detected _before_ SATA, so you names >>probaly became: >>- ata via libata -> sda (HD), sr0 (CDROM) >>- sata -> sdb. >> >> > >on fedora this doesn't matter (due to mount-by-label) > >the bigger problem I suspect is that the sata modules aren't part of the >initrd! > >you can force the issue by adding > >alias scsi_hostadapter1 ata_piix > >to the /etc/modprobe.conf file, and then recreating the initrd >(see the mkinitrd tool, or just install the kernel rpm) > > > > > > Thanks all.
Arjan, using combined_mode=libata and making a new ramdisk increased my xfer rate from 1.xx mb/sec to 28.xx mb/sec.
I am curious as to why my friends dell inspiron 8200 with a 1.8ghz p4 and the same drive using the same drive with FC6 and the standard ide module gets 44 to 45 mb/sec.
Steve
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