Re: libata question

[Tejun Heo <htejun@gmail.com>]

Roger Oberholtzer wrote:
> On Wed, 2006-08-02 at 00:33 +0900, Tejun Heo wrote:
>> Roger Oberholtzer wrote:
>>> Should hotplug work with Intel Corporation 82801GB/GR/GH (ICH7
>>> Family) chipset? I am trying kernel 2.6.17.7

Ah.. I should have spotted this earlier.  2.6.17.7 doesn't contain 
updated EH and doesn't support any of new features including 
hot/warmplug.  Please try 2.6.18-rc3.

>>> I have been trying the warmplug stuff. But I am not convinced it is 
>>> acting as I expect. If I remove a disk and then do a scan, shouldn't
>>> the disk entry go away?
>> Eventually, yes.  Do you mind to send me the dmesg?
> 
> I have picked out the lines related to this. Some of the complaints at
> the end are probably when I moved the disk. 

Yeap, those look pretty normal for the previous code.  :p

>>> I know about the problems with just removing a disk. But this is with
>>> one that is not mounted. I just want to see if the disks are properly
>>> sensed as coming and going. I am using the warmplug instructions on
>>> your web site.
>> There are some complications with piix PCS register (port 
>> enable/disable) which always seems to have some problem.  If you can use 
>> AHCI mode, it will be *much* better.
> 
> OK. How do I get it in ahci mode? I see that both the ata_piix and achi
> drivers are loaded. This is what is loaded:

Plain ICH7 doesn't support ahci. ICH7R supports ahci mode and usually 
configurable in the BIOS menu.  On my board (P5LD2), it's in the first 
page (the left-most one where the clock setting is and hard disks are 
enumerated), it's called IDE configuration or something.

>> If you think the driver doesn't do the right thing(tm), please send me 
>> detailed info.  I'll try to fix the problem if possible or explain why 
>> it can't be fixed at the very least.
> 
> I bet the driver does the right thing. The trick is knowing what that is
> supposed to be. And how to use the various commands on files in /sys at
> the correct time and in the correct order.

Really, it's not that complicated.

-- 
tejun