GPT_HDR_BLKNO
(off = (blksize * GPT_HDR_BLKNO)) <= SCANSIZE - sizeof(hdr);
#define GPT_TYPE(offs) ((offs) == GPT_HDR_BLKNO ? "primary" : "secondary")
if (gptp->hdr_lba_self != GPT_HDR_BLKNO &&
read_gpt(GPT_HDR_BLKNO, &gpt1);
hdr->hdr_lba_self = htole64(GPT_HDR_BLKNO);
hdr->hdr_lba_alt = htole64(GPT_HDR_BLKNO);
gptsector[0] = rf_offset + GPT_HDR_BLKNO;
gptsector[0] = GPT_HDR_BLKNO;
error = dkwedge_read(pdk, vp, GPT_HDR_BLKNO << pdk->dk_blkshift,
status = efi_block_read(bdev, (EFI_LBA)GPT_HDR_BLKNO * bdev->bio->Media->BlockSize, &hdr,