Re: [SeaBIOS] [PATCH] fix two issues with virtio-blk

[Sebastian Herbszt]

Kevin O'Connor wrote:
> On Sun, May 16, 2010 at 02:59:19PM +0200, Sebastian Herbszt wrote:
> > Kevin O'Connor wrote:
> > > On Sat, May 15, 2010 at 10:08:54PM +0200, Sebastian Herbszt wrote:
> > > > with CDROM support. Sure you can grab another 4 KB for a RMW buffer,
> > >
> > > It's only 2KB more - the buffer could be shared.
> >
> > Even if you want to be able to copy from CDROM emulation to a disk with 4 KB
> > physical sectors? I assume you need 2 KB for CDROM emulation and 4 KB for RMW.
>
> There is no "copy" BIOS command.  To copy data, the caller must read a
> sector into memory and then write the sector from its memory to the
> new disk.  Both read and write BIOS operations can use the same 4KB
> buffer.

Oops - you are right. My bad.

Sebastian