I don't expect they are present!
Last I read there wasn't a true 'standard', one manufacturer had
proposed an extension...

The actual change has a two entry fifo mon the disk that contains
the sector number.  Two writes (to the same address) are required to
set the sector number...  I recall the sector count also being
duplicated.

The driver changes wouldn't be too hard - but I've not looked at the
netbsd driver :-)

There are other solutions - but I don't think the drive manufacturers
considered them (sectors >512 bytes and ATAPI disks spring to mind...)

    David

> We are looking at using some Maxtor 160GB IDE drives under NetBSD 1.5.1, and
> realise there is a change when drives get bigger than 137GB: