alts_parttbl
struct alts_parttbl *ap_tblp; /* alts partition table */
ap->ap_tblp = (struct alts_parttbl *)malloc(ap->ap_tbl_secsiz);
struct alts_parttbl *ap_tblp; /* alts partition table */
#define ALTS_PARTTBL_SIZE sizeof (struct alts_parttbl)
struct alts_parttbl *ap;
ap = (struct alts_parttbl *)dadk_iob_xfer(DKTP_DATA, handle, B_READ);