Re: HVM disc corruption (was Re: Xen won't start its device backend?)

[John Nemeth <jnemeth%cue.bc.ca@localhost>]

On Jun 2, 11:03pm, Reinoud Zandijk wrote:
} On Tue, Jun 02, 2015 at 08:55:38PM +0200, Manuel Bouyer wrote:
} > On Tue, Jun 02, 2015 at 08:50:17PM +0200, Reinoud Zandijk wrote:
} > > The error only starts to show between block 250.000.000 (27.89 bits) and block
} > > 300.000.000 (28.16 bits). And indeed, block 268.435.456 (2^28) maps to sector
} > > 0 but block 268.435.455 is wrong already.
} > > 
} > > Looking at the dmesg, am I right that the piixide in compatibility mode is
} > > thus resulting in this error since the hvm wd0 uses LBA48 addressing.
} > 
} > Yes, it looks like the IDE emulation in qemu is not working as it should
} > with LBA48
} 
} wd0 reports it supports LBA48 still but i don't see a line claiming its using.
} It only reports PIO mode 4, DMA mode 2.

     You're mixing apples and oranges here.  LBA48 refers to the
way commands are sent to drive.  PIO mode 4 and DMA mode 2 refer
to how data is transfered.

}-- End of excerpt from Reinoud Zandijk