Pdp11 2.11bsd floppy direct access

... I think this is related to the routine partition_check() in the kernel source file src/sys/sys/ufs_disksubr.c which is used, for example, by the routine rastrategy() in the source file src/sys/pdpuba/ra.c I'll have to see if I can find the copy of the source files where I modified this to work around this issue when I needed to do this. Possibly I just commented out this section of the partition_check() routine: /* * Check for write to write-protected label area. This does not include * sector 0 which is the boot block. */ if (bp->b_blkno + pi->p_offset <= LABELSECTOR && bp->b_blkno + pi->p_offset + sz > LABELSECTOR && !(bp->b_flags & B_READ) && !(dk->dk_flags & DKF_WLABEL)) { bp->b_error = EROFS; goto bad; }