projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 37adbef5 MK |
1 | .\" from Symmetric Computer Systems. |
| 2 | .\" Modifications Copyright (c) 1987 Regents of the University of California. | |
| 3 | .\" All rights reserved. The Berkeley software License Agreement | |
| 4 | .\" specifies the terms and conditions for redistribution. | |
| 5 | .\" | |
| 6 | .\" @(#)disklabel.5.5 6.1 (Berkeley) %G% | |
| 7 | .\" | |
| 8 | .TH DISKLABEL 5 "" | |
| 9 | .UC 7 | |
| 10 | .SH NAME | |
| 11 | disklabel \- disk pack label | |
| 12 | .SH SYNOPSIS | |
| 13 | .B #include <sys/disklabel.h> | |
| 14 | .SH DESCRIPTION | |
| 15 | Each disk or disk pack on a system may contain a disk label | |
| 16 | which provides detailed information | |
| 17 | about the geometry of the disk and the partitions into which the disk | |
| 18 | is divided. | |
| 19 | It should be initialized when the disk is formatted, | |
| 20 | and may be changed later with the | |
| 21 | .IR disklabel (8) | |
| 22 | program. | |
| 23 | This information is used by the system disk driver and by the bootstrap | |
| 24 | program to determine how to program the drive | |
| 25 | and where to find the filesystems on the disk partitions. | |
| 26 | Additional information is used by the filesystem in order | |
| 27 | to use the disk most efficiently and to locate important filesystem information. | |
| 28 | The label is located in sector number | |
| 29 | .I LABELSECTOR | |
| 30 | of the drive, usually sector 0 where it may be found | |
| 31 | without any information about the disk geometry. | |
| 32 | It is at an offset | |
| 33 | .I LABELOFFSET | |
| 34 | from the beginning of the sector, to allow room for the initial bootstrap. | |
| 35 | The format of the disk label, as specified in | |
| 36 | .RI < sys/disklabel.h >, | |
| 37 | is | |
| 38 | .nf | |
| 39 | .DT | |
| 40 | .so /usr/include/sys/disklabel.h | |
| 41 | .SH "SEE ALSO" | |
| 42 | disktab(5), disklabel(8) |