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1 | .\" Copyright (c) 1980, 1991 Regents of the University of California. |
2 | .\" All rights reserved. | |
3 | .\" | |
4 | .\" Redistribution and use in source and binary forms, with or without | |
5 | .\" modification, are permitted provided that the following conditions | |
6 | .\" are met: | |
7 | .\" 1. Redistributions of source code must retain the above copyright | |
8 | .\" notice, this list of conditions and the following disclaimer. | |
9 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
10 | .\" notice, this list of conditions and the following disclaimer in the | |
11 | .\" documentation and/or other materials provided with the distribution. | |
12 | .\" 3. All advertising materials mentioning features or use of this software | |
13 | .\" must display the following acknowledgement: | |
14 | .\" This product includes software developed by the University of | |
15 | .\" California, Berkeley and its contributors. | |
16 | .\" 4. Neither the name of the University nor the names of its contributors | |
17 | .\" may be used to endorse or promote products derived from this software | |
18 | .\" without specific prior written permission. | |
19 | .\" | |
20 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
21 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
22 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
23 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
24 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
25 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
26 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
27 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
28 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
29 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
30 | .\" SUCH DAMAGE. | |
31 | .\" | |
32 | .\" @(#)swapon.8 6.3 (Berkeley) 3/16/91 | |
33 | .\" | |
34 | .Dd March 16, 1991 | |
35 | .Dt SWAPON 8 | |
36 | .Os BSD 4 | |
37 | .Sh NAME | |
38 | .Nm swapon | |
39 | .Nd "specify additional device for paging and swapping" | |
40 | .Sh SYNOPSIS | |
41 | .Nm swapon | |
42 | .Fl a | |
43 | .Nm swapon | |
44 | .Ar special_file ... | |
45 | .Sh DESCRIPTION | |
46 | .Nm Swapon | |
47 | is used to specify additional devices on which paging and swapping | |
48 | are to take place. | |
49 | The system begins by swapping and paging on only a single device | |
50 | so that only one disk is required at bootstrap time. | |
51 | Calls to | |
52 | .Nm swapon | |
53 | normally occur in the system multi-user initialization file | |
54 | .Pa /etc/rc | |
55 | making all swap devices available, so that the paging and swapping | |
56 | activity is interleaved across several devices. | |
57 | .Pp | |
58 | Normally, the first form is used: | |
59 | .Bl -tag -width Ds | |
60 | .It Fl a | |
61 | All devices marked as ``sw'' | |
62 | swap devices in | |
63 | .Pa /etc/fstab | |
64 | are made available. | |
65 | .El | |
66 | .Pp | |
67 | The second form gives individual block devices as given | |
68 | in the system swap configuration table. The call makes only this space | |
69 | available to the system for swap allocation. | |
70 | .Sh SEE ALSO | |
71 | .Xr swapon 2 , | |
72 | .Xr fstab 8 | |
73 | .Xr init 8 | |
74 | .Xr rc 8 | |
75 | .Sh FILES | |
f5b94186 GW |
76 | .Bl -tag -width /dev/[ws]d?b -compact |
77 | .It Pa /dev/[ws]d?b | |
15637ed4 RG |
78 | standard paging devices |
79 | .It Pa /etc/fstab | |
80 | ascii filesystem description table | |
81 | .El | |
82 | .Sh BUGS | |
83 | There is no way to stop paging and swapping on a device. | |
84 | It is therefore not possible to make use of devices which may be | |
85 | dismounted during system operation. | |
86 | .Sh HISTORY | |
87 | The | |
88 | .Nm | |
89 | command appeared in | |
90 | .Bx 4.0 . |