Re: bio too big device

Jens Axboe
2003-03-12T15:58:58Z

On Wed, Mar 12 2003, Alan Cox wrote:
> On Wed, 2003-03-12 at 15:11, Jens Axboe wrote:
> > Then go with 128. I'd like to stress again that _if_ you get worse
> > performance it's not due to the request being a bit smaller, but indeed
> > because 248 can cause badly aligned requests.
> >
> > > got the IDE layer using 256 block writes even if we have to limit it
> > > to more modern drives by some handwaving (8Gb+ say)
> >
> > Does Windows use 256 sector requests or not? If not, then I'd sure don't
> > want to do it in Linux, the handwaving doesn't mean anything then.
>
> I am told it does, Andre can you confirm this either way. If not then its
> time to ask vendors to confirm and any vendor who says "our drives are fine"
> we put on the ok list.

Well I can hook an analyzer to such a bastard and verify it for sure,
that's one way :)

If Windows does, then we have nothing to worry about.

--
Jens Axboe