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

[Kris Kennaway]

On Wed, Oct 08, 2003 at 07:05:49PM -0700, Doug White wrote:

> > > 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.

This is a FreeBSD bug that was introduced within the past few months,
perhaps with ATAng.

Kris
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