Thread (23 messages) 23 messages, 6 authors, 2011-07-22

Re: decoding PMP errors with Marvel SATA controller

From: Marc MERLIN <hidden>
Date: 2011-06-27 00:06:23

Speaking of which, what sata chips are recommended nowadays for PMP outside
sil24 cards?

On Sun, Jun 26, 2011 at 01:38:38PM -0400, Mark Lord wrote:
quoted
This sounds a lot like another recent PMP problem we had with marvell.
It could be that FIS-based switching doesn't work quite as well for
some reason.
This all *used* to work with sata_mv.
But I also recently noticed my sata_mv cards no longer work with the
4-port Marvell PMP here, and that combo definitely did work when I
finished with it all (back around 2.6.29 or so).
 
I also used it but it was back 2-3 years ago now. I think it even worked
back in 2.6.18.
I'm rather distracted here right now with broken internet connectivity,
and hunting for new providers etc., so not likely to dig around on it.

Perhaps Marc MERLIN could retest with an older kernel,
say 2.6.32 or 2.6.29 even, and see what happens with those.
Hopefully it will work there for him, and we'll have a starting
point to bisect the issue.
So it's a bit difficult for me to get too much data on this since it's a
production system and downtime does come at somewhat of a premium.

However, if whoever may be able to work on it and see what broke (because it
almost works, I see all the drives on my PMP and I can read data somewhat, I
just get a lot of somewhat scary errors now) lets me know, if he/she has no
way to test him/herself, I'll see what I can do to help out and get to
replicate this with older kernels on either that server, or maybe another
machine I would have to build for it (trying repeatedly on production data,
even with backups, not so good :) ).

Thanks for the answer,
Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/  
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