vd_capacity
stp->vd_capacity.value.ui64 = dsk_size * blk_size;
kstat_named_init(&stp->vd_capacity, "Size",
stp->vd_capacity.value.ui64 = vdc->vdisk_size * vdc->vdisk_bsize;
struct kstat_named vd_capacity; /* Capacity of the disk */