problems with RAID0 and Intel/SE7501WV2/Promise

[Danny Braniss]

> On Sat, 3 Jul 2004, Danny Braniss wrote:
> 
> > > > How did you construct the array volume?  This looks like one of the
> > > > offsets in the disklabel is wrong.
> > > >
> > >
> > > I used sysinstall, and disklabel -e to change the partition letters.
> > > The problem appears after several hours of disk usage, and the only
> > > partition in use is h.
> > >
> > whops, rereading the question, here is the correct answer, sorry.
> >
> > I used the bios to define the raid0, stripe, 2 disks.
> > (the menu is 'fool-proof', so i guess i couldn't have made a mistook :-)
> 
> OK, so you used the ATA controller's menu to construct the RAID array,
> then used sysinstall to slice the ensuing volume. Hm.  It appears that
> writes to sector 0 are disallowed.  Can you try installing without the
> array defined, to make sure the disks are writable otherwise?
> 

the problem appears after several hours of reading/writing - actually
building a huge postgres database, the partition is h, not even close
to the begining of the disk, and IMHO the kernel/postgres have no reason to
write on fsbn 0 (ad4 bn 0; cn 0 tn 0 sn 0) in any case.
btw, a similar system is working ok, with the small difference in the size
of the disks, 120GBx2 vs. 200GBx2 RAID0

> > > > > Jul  2 10:18:35 cs7.cs.huji.ac.il /kernel: ad4: hard error writing fsbn 0 (ad4
> > > > > bn 0; cn 0 tn 0 sn 0) trying PIO mode
> > > > > Jul  2 10:18:35 cs7.cs.huji.ac.il /kernel: ad6: hard error writing fsbn 0 (ad6
> > > > > bn 0; cn 0 tn 0 sn 0) status=51 error=10
> > > > > Jul  2 10:18:35 cs7.cs.huji.ac.il /kernel: ar0: ERROR - array broken
> > > > > Jul  2 10:18:35 cs7.cs.huji.ac.il /kernel: ad4: hard error writing fsbn 0 (ad4
> > > > > bn 0; cn 0 tn 0 sn 0) status=51 error=10
> > > > > Jul  2 10:18:35 cs7.cs.huji.ac.il /kernel: ar0: ERROR - array broken
> > > > > Jul  2 10:18:35 cs7.cs.huji.ac.il /kernel: ar0: ERROR - array broken
> 
> -- 
> Doug White                    |  FreeBSD: The Power to Serve
> dwhite at gumbysoft.com          |  www.FreeBSD.org