savecore: first and last dump headers disagree on /dev/ad0b

[Doug White]

On Tue, 7 Oct 2003, Kris Kennaway wrote:

> On Tue, Oct 07, 2003 at 06:11:30PM -0700, Doug White wrote:
> > On Tue, 7 Oct 2003, YONETANI Tomokazu wrote:
> >
> > > The hardware is IBM NetFinity 6000R, and it has ServerWorks ROSB4 UDMA33
> > > controller, to which the IDE disk is attached. The size of the IDE hard
> > > disk is 4Gbytes, and the size of the kernel dump and physical memory both
> > > fits in that size.
> >
> > The ROSB4 is known to have data-corruption problems with running in UDMA
> > mode.  The dump is probably tripping over this, which is why Tor's patch
> > works since it demotes the device back to PIO.
>
> I also had problems dumping onto a UDMA66 disk on a promise PDC20267
> controller - it seemed to dump OK (dump was readable after I recovered
> the disk), but it (or maybe the crash itself) trashed the partition
> table.
>

Well that woudl be funny since the problem boards were replaced with Tyan
S2518s, which have a PDC20267 onboard as well as the ROSB4.  The disks
were attached to the Promise, and never had any data corruption issues
with them, at least under linnex.

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite at gumbysoft.com          |  www.FreeBSD.org