VBD_BSIZE
* VBD_BSIZE;
xbd_io->xio_start_offset = xbd_io->xio_seg[0].first_sect * VBD_BSIZE;
vaddr_t segoffset = seg->first_sect * VBD_BSIZE;
VBD_BSIZE;
vaddr_t segoffset = seg->first_sect * VBD_BSIZE;
VBD_BSIZE;
#define VBD_MAXSECT ((PAGE_SIZE / VBD_BSIZE) - 1)