Re: Promise SATA TX4 300 port timeout with sata_promise in 2.6.22, kernel panic in 2.6.23

[Patric Karlsson <patric@ce.chalmers.se>]

Tejun Heo wrote:
> Hello,
> 
> I Stratford wrote:
>> The purpose of the mail is to document and share my experience in the
>> hope that someone might find it useful, either for debugging their own
>> TX4 300-centric system issues or figuring out what is up with
>> sata_promise and the TX4 300 in 3Gbps mode. I also wish to offer my
>> somewhat unique promise-based system as a test environment for either
>> the timeout or kernel panic issues. I obviously have some basic need
>> for data integrity of the RAID5, but this system is not in production
>> and is therefore more available for testing purposes than the average
>> machine with 22 Promise SATA ports..  :)
> 
> [cc'ing Mikael Pettersson]
> 
> It seems those 3Gbps promise controllers have hard time getting out of
> transmission errors.  Is it because hardreset doesn't work?  Can we fix it?
> 
> Also, if 3Gbps can't be made reliable on those controllers, how about
> limiting it to 1.5Gbps by default with appropriate warning messages?
> Without PMP, it's not like we're gonna earn anything by driving the
> thing at 3Gbps.
> 
> Thanks.
> 

I thought this was supposed to be fixed in 2.6.24-RC2 ?

Although I'm currently running a TX4 myself in 3Gbit mode with 2.6.23.1, 
  I'm waiting for 2.6.24 to reach stable until I try it out myself.
2.6.23.1 seemed to fix the hard-lock when it tried to reset the card 
tho, so now I just get a few errors about "soft resetting" in the logs. 
No data loss.

/Patric