Re: raidframe: Initiating parity re-write time

[uhel%gmx.net@localhost]

On Wed, 25 May 2011 22:26:14 +0200
Manuel Bouyer <bouyer%antioche.eu.org@localhost> wrote:

> On Tue, May 24, 2011 at 10:45:04PM +0200, uhel%gmx.net@localhost wrote:
> > > I found 'SATA Mode Select' in the BIOS and changed it from 'SATA Mode'
> > > to 'AHCI Mode'. Whats the difference?
> 
> In ACHI mode the ahcisata driver is used (instead of pciide). It knows
> how to use DMA, and the controller's programming interface is much
> clever. For example, with pciide a channel is shared by 2 drives,
> while in ahci each drive has its own DMA channel.
> 
> > 
> > There is also another option in the BIOS that might be useful: 'Change
> > the AHCI DID for Linux' but I have no clue what that means.
> > 
> > Aside of that, is it expected that the drive enumeration changes after
> > switching to AHCI mode?
> 
> Yes, as all drives are master now

Ah okay, I thought with SATA thats always the case (independently of
the driver) .

> > wd1 is now wd2, will that matter to raidframe?
> 
> No if you use autoconfiguration. I suggest you do the change in the
> config file though, so that the order is correct if you ever need to
> force a reconfiguration using that file.
> 

Thaks for the explanation and the tip!

regards
Uli