pmon_iostrategy
{ "wd", pmon_iostrategy, pmon_ioopen, pmon_ioclose, noioctl }
if (pmon_iostrategy(pi, F_READ, DOSBBSECTOR, DEV_BSIZE, buf, &rsize))
if (pmon_iostrategy(pi, F_READ, sector + DOS_LABELSECTOR, DEV_BSIZE,
int pmon_iostrategy(void *, int, daddr_t, size_t, void *, size_t *);