[mythtv-users] Legacy drives and new motherboards

[Stephen Worthington]

On Thu, 20 Feb 2014 18:59:04 -0800, you wrote:

>I just waged an epic battle to get a new mobo with 6GBps SATA ports to 
>recognize my legacy 3GBps hard drives.
>
>I am going to guess that many of us have a basket full of old slow hard 
>drives that just keep chugging away so this is probably not unique.
>
>For posterity:
>
>edit /etc/default/grub and find the line:
>
>GRUB_CMDLINE_LINUX=""
>
>Change it to:
>
>GRUB_CMDLINE_LINUX="libata.force=3:3.0G,4:3.0G,5:3.0G,6:3.0G"
>
>where the port numbers correspond to the ataX numbers in dmesg output.  
>Set those ports to 3.0G to work with older hard drives.
>
>My Asus Z87 mobo bios doesn't recognize those drives at all but they 
>show up as soon as the kernel slows the ports down.
>
>Make sure you run update-grub after you make the changes.

I am very surprised at this.  I have had no problems with putting any
SATA drive on any SATA port.  I have a mixture of port and drive
speeds, and have never had any problems at all.  My understanding of
the SATA standards is that there should be no problems with mixing
speeds in any combination.  So I would think that your problem should
be reported as a driver bug.