Re: Use of floppy disks and parallel ATA on amd64

On Mon, Oct 14, 2024 at 02:45:34PM -0400, Thor Lancelot Simon wrote:
> I would also like to disable support for old parallel ATA drives (those
> not supporting 48-bit LBA mode, and thus limited to 128K -1 block transfers).
> 
> I'd like to do this to allow us to increase MAXPHYS to 128K or more in amd64
> GENERIC, improving I/O throughput.

This reads to me as: "In order to increas MAXPHYS to 128K I want to
disable PATA drive that don't support 58-bit LBA mode because they don't
support >64K transfers.  But they don't support MAXPHYS transfers anyway,
only up to MAXPHYS-512 bytes."

That doesn't look like a consistent arguemnt to me.

What actual technical problems do you want to address this way?
Preferably ones that we have actually observed in the real world.

--chris