Re: Abysmal PATA IDE performance

From: Arjan van de Ven
Date: Thu Nov 09 2006 - 04:03:42 EST


> 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)



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