On Oct 10, 2005, at 10:09 AM, SODA Noriyuki wrote:

>>>>>> On Mon, 10 Oct 2005 09:21:52 -0700, Chuck Silvers  
>>>>>> <chuq@chuq.com> said:
>
>> all of the devices that I know of with such restrictions on  
>> writing have
>> a sector size of 512 bytes or larger, so this isn't an issue in  
>> practice.
>
> Well, some older pc98 uses 256bytes/sector.
> Of course, currently pc98 isn't supported by NetBSD, though...

Older HP-IB drives also had 256 bytes/sector.  The hp300 port's rd(4)  
driver does all of the necessary fiddling.  It only matters if you  
have file systems laid down on the disk that don't have 512-byte  
alignment, which I have never encountered in the wild.

-- thorpej