[nycbug-talk] Reproducible data corruption on 6.1-Stable [Long but please read]

Jonathan Stewart jonathan at kc8onw.net
Thu Sep 14 08:20:47 EDT 2006

George Georgalis wrote:
> On Wed, Sep 13, 2006 at 07:00:52PM -0400, Jonathan Stewart wrote:
>> ad4: 305245MB <Seagate ST3320620AS 3.AAC> at ata2-master UDMA133
>> ad6: 305245MB <Seagate ST3320620AS 3.AAC> at ata3-master UDMA133
> Sorry I didn't take a close look at your issue, but please check
> sector 0xfffffff and 0x10000000.
> the on their larger (?) drives seagate doc says use LBA32 for
> sectors <= 0xfffffff and LBA48 for sectors >0xfffffff when the
> drives actually require LBA32 < 0xfffffff and LBA48 for sectors
> =>0xfffffff
> I haven't tested yet, but I think these numbers are correct. In
> netbsd many seagate drives are in a quirk table, but last I
> checked my 400 and 500Gb ones where not.

Did you mean doing something like
sudo dd if=/dev/ad4 of=/tmp/temp skip=268435455 count=1
sudo dd if=/dev/ad4 of=/tmp/temp skip=268435456 count=1
sudo dd if=/dev/ad4 of=/tmp/temp2 skip=268435456 count=1

to make sure I can read the sectors and the reads come back the same
each time?  If so then yes to both.


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