Symbol: XDF_NHEADS
usr/src/uts/common/xen/io/xdf.c
1754
ncyl = vdp->xdf_xdev_nblocks / (XDF_NHEADS * XDF_NSECTS);
usr/src/uts/common/xen/io/xdf.c
1759
geomp->g_nhead = XDF_NHEADS;