On Jun 2, 2020, at 9:52 AM, Clem Cole <clemc@ccc.com> wrote:

The good news is that all the DEC systems used 512 byte fixed blocks much later than LSX so driver support is doubtful. 

Except on the RX’s.   The RX01 was 128 byte sectors and the later ones 256 and a odd interleaving strategy.    However, the boot block and the rest of the file systems (both UNIX and RT at least)

just aggregated the smaller (logical) sectors together to make a 512 byte one.