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Keep d_ncylinders correct

This commit is contained in:
rvb 1998-08-13 18:18:54 +00:00
parent 48bf26949f
commit e829016cba
1 changed files with 23 additions and 5 deletions
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28
sys/arch/i386/i386/disksubr.c
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@ -1,4 +1,4 @@
/* $NetBSD: disksubr.c,v 1.31 1998/08/05 02:45:08 perry Exp $ */
/* $NetBSD: disksubr.c,v 1.32 1998/08/13 18:18:54 rvb Exp $ */
/*
* Copyright (c) 1982, 1986, 1988 Regents of the University of California.
@ -88,6 +88,13 @@ readdisklabel(dev, strat, lp, osdep)
lp->d_secsize = DEV_BSIZE;
if (lp->d_secperunit == 0)
lp->d_secperunit = 0x1fffffff;
if (lp->d_ncylinders == 16383) {
printf("disklabel: Disk > 8G ... readjusting chs %d/%d/%d to ",
lp->d_ncylinders, lp->d_ntracks, lp->d_nsectors);
lp->d_ncylinders = lp->d_secperunit / lp->d_ntracks / lp->d_nsectors;
printf("%d/%d/%d\n",
lp->d_ncylinders, lp->d_ntracks, lp->d_nsectors);
}
lp->d_npartitions = RAW_PART + 1;
for (i = 0; i < RAW_PART; i++) {
lp->d_partitions[i].p_size = 0;
@ -172,10 +179,21 @@ readdisklabel(dev, strat, lp, osdep)
dp->dp_size;
lp->d_partitions[2].p_offset =
dp->dp_start;
lp->d_ntracks = dp->dp_ehd + 1;
lp->d_nsectors = DPSECT(dp->dp_esect);
lp->d_secpercyl =
lp->d_ntracks * lp->d_nsectors;
if (lp->d_ntracks != dp->dp_ehd + 1 ||
lp->d_nsectors != DPSECT(dp->dp_esect)) {
printf("disklabel: readjusting chs %d/%d/%d to ",
lp->d_ncylinders, lp->d_ntracks,
lp->d_nsectors);
lp->d_ntracks = dp->dp_ehd + 1;
lp->d_nsectors = DPSECT(dp->dp_esect);
lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
lp->d_ncylinders = lp->d_secperunit / lp->d_secpercyl;
if (! lp->d_ncylinders)
lp->d_ncylinders = 1;
printf("%d/%d/%d\n",
lp->d_ncylinders, lp->d_ntracks,
lp->d_nsectors);
}
}
}
lp->d_npartitions = RAW_PART + 1 + i;