PDC arrays > 2 TB and non 512 byte dm sector size

Bad Bod badbod at badbod.com
Fri Nov 23 18:12:14 UTC 2012

Has the checksum error for Via (8237) RAID  been fixed. That the checksum
could never be met was pointed out some time ago.

I do realize that this chipset is now, very probably, 'obsolete' , but it
did work once. Regression ignored is surely satanism?



On Fri, Nov 23, 2012 at 9:27 PM, Ian Stakenvicius, Aerobiology Research <
ian at aerobiology.ca> wrote:

> On 21/11/12 04:08 PM, Phillip Susi wrote:
> > On 11/21/2012 9:19 AM, Heinz Mauelshagen wrote:
> >>> No, dm goes by hard sector sizes, not pretended ones.
> >
> > What do you mean?  dm devices are virtual so there is no "hard" sector
> > size; it's all virtual.  Are you saying it is hard coded to report 512
> > bytes and can't be changed?
> I'm guessing that what Heinz means is that dmraid reads superblocks or
> whatever in accordance with the sector size on the hardware itself
> ("hard" = hardware level); since it does this in order to feed the
> correct setup info to device-mapper it would not be acting on virtual
> devices..
> Just my interpretation though, please correct me if i'm wrong.
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