--- /usr/src/sys/fs/devfs/devfs_vnops.c	(revision 279197)
+++ /usr/src/sys/fs/devfs/devfs_vnops.c	(working copy)
@@ -61,6 +61,7 @@ 
 #include <sys/ttycom.h>
 #include <sys/unistd.h>
 #include <sys/vnode.h>
+#include <geom/geom.h>
 
 static struct vop_vector devfs_vnodeops;
 static struct vop_vector devfs_specops;
@@ -700,6 +701,8 @@ 
 		fix(de->de_ctime);
 		vap->va_ctime = de->de_ctime;
 	} else {
+		struct g_provider *pp;
+
 		dev = vp->v_rdev;
 		fix(dev->si_atime);
 		vap->va_atime = dev->si_atime;
@@ -709,6 +712,13 @@ 
 		vap->va_ctime = dev->si_ctime;
 
 		vap->va_rdev = cdev2priv(dev)->cdp_inode;
+
+		pp = g_dev_getprovider(dev);
+
+		if (pp) {
+			vap->va_size = vap->va_bytes = pp->mediasize;
+			vap->va_blocksize = pp->sectorsize;
+		}
 	}
 	vap->va_gen = 0;
 	vap->va_flags = 0;