RAID1 size issue with PDC20265

Heinz Mauelshagen mauelshagen at redhat.com
Fri Mar 11 14:46:44 UTC 2005


On Fri, Mar 11, 2005 at 02:19:50AM -0500, Alex Ryabtsev wrote:
> Hi Peter,
> 
> it is not exactly controller (add-in card) - it is integrated chipset of
> ASUS A7V motherboard with patched _BIOS_ to being able to boot from RAID
> and use it under other supported systems (Windows perhaps) and have
> redundancy for system boot as well too. I am not using patched dmraid (I
> just pointed on that post in case if my problem has same roots). 
> 
> And as I said, it is working for me fine, but I am loosing here 100G of
> redundant disk space, which is a bit disappointing ;-).

Alex,

you're the first to report the pdc size error...

I followed the metadata format handler code back to the first version,
and the size error reported seems to be in there since ever :(

Fix will be in rc7.

Heinz

> 
> Regards,
> Alex
> 
> On Fri, 2005-03-11 at 02:05 -0500, Peter Bense wrote:
> > Alex,
> > 
> > I have a fair bit of experience installing these controllers in Gentoo. 
> > Your problem description is pretty vague, however.
> > 
> > Out of curiousity, why are you using dmraid?  What is it that is
> > 'patched'?  Please elaborate.
> > 
> > I just build a new kernel in Gentoo with PDC support in my installs.  (I
> > have 3 systems that I've configured with Promise cards in Gentoo...)
> > 
> > ./peter
> > 
> > Peter T. Bense - Teradata Certified Professional
> > (ptbense at gwm.sc.edu) - 803-777-9476 
> > Database Administrator/Webmaster
> > Prevention Research Center
> > University of South Carolina
> > >>> alxsey at hotmail.com 03/11/05 12:22 AM >>>
> > Hi,
> > 
> > being new to this list and to dmraid, I could not be so sure is my
> > problem is what Paul Moore describes here
> > (https://www.redhat.com/archives/ataraid-list/2005-February/msg00004.html
> > - Subject: Re: Some strange behavior with Promise Fasttrak).
> > 
> > I am using dmraid (rc5) within Gentoo (using dmraid initrd) on Promise
> > integrated PDC20265 controller with patched for RAID support BIOS. It
> > works pretty well (although I had no chance to check raid1 , which I am
> > using, functionality). There is only problem that from my two 200G hard
> > drives I have acceseble 100G only (remember, this is RAID1, so I have to
> > have 200G). dmraid rc6 looks like does not helps here too much, but for
> > me even makes things worse - it is changing mapped set name and as far
> > as I can tell, fdisk show me same 100G, and I have only 3 devices
> > in /dev/mapper instead of 5 I'm having with rc5.
> > 
> > Is there any advice for my case or I am too unclear here?
> > 
> > Regards,
> > Alex
> > 
> 
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Heinz Mauelshagen                                 Red Hat GmbH
Consulting Development Engineer                   Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen at RedHat.com                            +49 2626 141200
                                                       FAX 924446
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