swapon.8

<B>Digital的Unix操作系统VAX 4.2源码</B>

.\" SCCSID: @(#)swapon.8	8.1	9/11/90
.TH swapon 8
.SH Name
swapon \- specify additional device for paging and swapping
.SH Syntax
.B "/etc/swapon"
.B \-a
.br
.B "/etc/swapon"
.I name ...
.SH Description
.NXR "swapon command"
.NXAM "system call" "swapon system call" "swapon command"
.NXR "device" "specifying for paging"
.NXR "device" "specifying for swapping"
The
.PN swapon
command
is used to specify additional devices on which paging and swapping
are to take place.
The system begins by swapping and paging on only a single device
so that only one disk is required at bootstrap time.
Calls to
.PN swapon
normally occur in the system multi-user initialization file 
.PN /etc/rc ,
making all swap devices available, so that the paging and swapping
activity is interleaved across several devices.
.PP
Normally, the
.PN \-a
option is given, causing all devices marked as ``sw''
(swap devices) in 
.PN /etc/fstab 
to be made available.
.PP
The second form gives individual block devices, as listed
in the system swap configuration table.  The call makes only this space
available to the system for swap allocation.
.SH Restrictions
There is no way to stop paging and swapping on a device.
It is therefore not possible to make use of devices which may be
dismounted during system operation.
.SH Files
.TP 20
.PN /dev/[ru][pk]?b
Normal paging devices
.SH See Also
swapon(2), init(8)