Does OS-9 have any support for 512 byte sectors or is it hard coded to 256 bytes? Neil ----- Original Message ----- From: "John E. Malmberg" <wb8tyw at qsl.net> ... > Most of the drives used 512 byte sectors, some did not and used other > sizes. If the sector size is wrong, then you will not be able to read > or write to the drive until it is reformatted. ...