Re: [osol-discuss] VIA VT6420 SATA RAID Controller not working

Mon, 22 Sep 2008 14:10:59 -0700

Joerg,

I do not know if VT8237R is ahci-compliant - it was not yet verified to work with the Solaris ahci driver (VT8251 was verified).
Is BIOS mentioning somewhere AHCI mode?
Using Knopix, find the pci vendor id/device id of this controller. You can try to add /etc/driver_aliases file either
ahci "pci1106,0591"        (providing that this is correct vid/did value)
or, a bit dangerous,
ahci "pciclass, 010400"

IF this chip is ahci-compliant, it may work, considering that ahci driver does not explicitly check vendor id. The caveat is, that you may have to further exeperiment with RAID settings to let system BIOS see unconfigured devices.
There will be no RAID operation in Solaris, but if the BIOS can see individual disks that are not configured into RAID volumes and such disks may be considered as boot device, AND Solaris ahci driver really works with this chipset, then you my be able to used attached disks.
This, however, is by no means a general solution to deal with software RAID controllers.

-Pawel
P.S. Let me know, if this works.


Joerg Schilling wrote: 
Milan Jurik <[EMAIL PROTECTED]> wrote:

  
There are three possibilities on some SATA controllers:

a) operate in "Legacy mode" - for compatibility reasons - not available
in SATA controller from VT8237R

b) operate in SATA mode - this one could work with ahci driver in your
case, maybe
    

This is what I am in hope for.

  
c) operate in "RAID" mode - this one is advertised by your controller
now
    

Well it has 2x SATA but there is only one disk now.

  
During system boot, there is possibility to enter configuration of this
SATA controller, just press <Tab> when POST is asking for it. Look if
you can change config of it to "non-RAID" somehow
    

This is what I did on Friday and I have been unable to change anything 
as the cursor keys did not work. Maybe because there is only one disk.
There is however no printed mode that looks like it is intended to disable
RAIS mode. There is something I cannot select to enable RAID mode.

  
But looking at documentation of your mainboard, I don't believe it will
work with Solaris drivers today.
    

So what could I do?

Jörg

  

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