SBLOCK_UFS1
if (!((bread(rfd, (off_t)SBLOCK_UFS1, &sblock, SBSIZE) == 1 &&
calcsb(realdev, fsreadfd, &proto, lp, SBLOCK_UFS1) == 0)
sblockloc = SBLOCK_UFS1;
sblock.fs_sblockloc = SBLOCK_UFS1;
rdfs(SBLOCK_UFS1 / DEV_BSIZE, SBSIZE, (char *)fs1);
wtfs(SBLOCK_UFS1 / DEV_BSIZE, SBSIZE, (char *)fs1);
{ SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_PIGGY, -1 }
fsopts->size += (SBLOCK_UFS1 + SBLOCKSIZE) * ncg;
sblock.fs_sblockloc = SBLOCK_UFS1;
sblock.fs_sblockloc = SBLOCK_UFS1;