segdesc
segdesc_t segdesc;
segdesc = SEGDESC_FROM_OFFSET(disk, bio->bio_offset);
if (segdesc->flags & MEDIA_MASTER) {
segdesc_t segdesc;
segdesc = SEGDESC_FROM_OFFSET(disk, bio->bio_offset);
if (segdesc->flags & MEDIA_MASTER) {
segdesc = SEGDESC_FROM_OFFSET(m_disk, bio->bio_offset);
if (segdesc->flags & UNINITIALIZED) {
segdesc = SEGDESC_FROM_OFFSET(disk, bio->bio_offset);
if (!(segdesc->flags & MEDIA_READ_DEGRADED)) {