--- Rui-Xiang Guo <rxg@myrealbox.com> wrote:

> On Tue, Dec 14, 2004 at 11:30:23PM -0800, Aaron J.
> Grier wrote:
> > On Wed, Dec 15, 2004 at 12:56:36PM +0800,
> Rui-Xiang Guo wrote:
> > > What's wrong?
> > > I am testing the raid0a file system to see if it
> is stable...
> > 
> > I would guess your cables are too long.  18 inches
> is the standard, I
> > believe.  CRC indicates data corruption in
> transferring data from the
> > disk to the controller.
> 
> Yes, indeed. Because it's very hard to connect all
> of 8 hard drivers with
> standard cables. But why just wd0 has such error?
> Is it harmful? How to fix it?
> 
> Thanks for your reply.
>

I think the issue not in cables.
UltraDMA mode can be the cause due to number of
drives.
You have to try to turn an UltraDMA mode off.
In order to do that kernel needs to be recompiled with
different IDE flags.
For instance you have:
wd* at wdc? channel ? drive ? flags 0x0000
To turn Ultra-DMA mode off set another flag:
wd* at wdc? channel ? drive ? flags 0x0f00

Let me know if it works out for you.

Vyacheslav Karpenko


		
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