Re: port multiplier problem

[Tejun Heo <tj@kernel.org>]

Hello,

On 01/22/2010 01:51 AM, Chandra Nepali wrote:
> I have a disk array of 12 disks. The interface card has two sil3726 port
> multiplier for 10 disks (5 disks in each port multiplier) and 2 direct
> sata connectors. The host controller is sil3124. It was connected to
> suse 10.4 and working fine.

Wasn't 10.3 the last of 10 series?  After that it was 11.0.  What's
the version of the kernel?

> There was a high voltage accident (high voltage to disk array only, not
> computer) and because of that we replaced the power supply of this disk
> array. Now, we are getting some problem, disks are not being
> recognized,.

Ouch...

> So, I connected it to Fedora 12 (To correct if it is
> because of some bugs) with driver sil24. Here are few things that I have
> tested.
> 
> 1) If I connect only one disk to direct sata connector, it works fine.
> 2) If I connect two disks to both direct sata connectors, it won't work.
> 3) If I connect  one disk to one direct sata and one disk directly to
> host controller, it works.

What do you mean by 'direct sata'?  How is it different from 'directly
to host controller'?

> 3) If I connect one or more disk to PM, it won't work.
> 4) If I connect one disk to direct sata and one to PM, it won't work.

Maybe the PMP is fried?

Thanks.

-- 
tejun