diff options
Diffstat (limited to 'sbin')
| -rw-r--r-- | sbin/bsdlabel/bsdlabel.8 | 26 | ||||
| -rw-r--r-- | sbin/bsdlabel/bsdlabel.c | 3 |
2 files changed, 22 insertions, 7 deletions
diff --git a/sbin/bsdlabel/bsdlabel.8 b/sbin/bsdlabel/bsdlabel.8 index f2d55ebdfc20..cbb4e345493b 100644 --- a/sbin/bsdlabel/bsdlabel.8 +++ b/sbin/bsdlabel/bsdlabel.8 @@ -273,7 +273,7 @@ Lowercase versions of and .Cm G are allowed. -Size and type should be specifed without any spaces between them. +Size and type should be specified without any spaces between them. .Pp Example: 2097152, 1G, 1024M and 1048576K are all the same size (assuming 512-byte sectors). @@ -408,8 +408,8 @@ Display what the label would be for .Pa da0s1 using the partition layout in .Pa label_layout . -This is useful for determining how much space would be alloted for various -partitions with a labelling scheme using +This is useful for determining how much space would be allotted for various +partitions with a labeling scheme using .Cm % Ns -based or .Cm * @@ -468,6 +468,20 @@ which could be used as a source file for f: 5g * 4.2BSD g: * * 4.2BSD .Ed +.Sh DIAGNOSTICS +The kernel device drivers will not allow the size of a disk partition +to be decreased or the offset of a partition to be changed while it is open. +.Sh COMPATIBILITY +Due to the use of an +.Vt u_int32_t +to store the number of sectors, +bsdlabels are restricted to a maximum of 2^32-1 sectors. +This usually means 2TB of disk space. +Larger disks should be partitioned using another method such as +.Xr gpt 8 . +.Pp +The various BSDs all use slightly different versions of BSD labels and +are not generally compatible. .Sh SEE ALSO .Xr ccd 4 , .Xr geom 4 , @@ -475,7 +489,5 @@ which could be used as a source file for .\" Xr bsdlabel 5 , .Xr disktab 5 , .Xr boot0cfg 8 , -.Xr fdisk 8 -.Sh DIAGNOSTICS -The kernel device drivers will not allow the size of a disk partition -to be decreased or the offset of a partition to be changed while it is open. +.Xr fdisk 8 , +.Xr gpt 8 diff --git a/sbin/bsdlabel/bsdlabel.c b/sbin/bsdlabel/bsdlabel.c index cef20506fd22..8d44e6878df0 100644 --- a/sbin/bsdlabel/bsdlabel.c +++ b/sbin/bsdlabel/bsdlabel.c @@ -477,6 +477,9 @@ readlabel(int flag) (ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) { err(4, "cannot get disk geometry"); } + if (mediasize > (off_t)0xffffffff * secsize) + errx(1, + "disks with more than 2^32-1 sectors are not supported"); (void)lseek(f, (off_t)0, SEEK_SET); if (read(f, bootarea, BBSIZE) != BBSIZE) err(4, "%s read", specname); |