4.4BSD/usr/share/man/cat8/swapon.0

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SWAPON(8)                 BSD System Manager's Manual                SWAPON(8)

NNAAMMEE
     sswwaappoonn - specify additional device for paging and swapping

SSYYNNOOPPSSIISS
     sswwaappoonn --aa
     sswwaappoonn _s_p_e_c_i_a_l___f_i_l_e _._._.

DDEESSCCRRIIPPTTIIOONN
     SSwwaappoonn 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 sswwaappoonn normally occur in the system multi-user initialization file
     _/_e_t_c_/_r_c making all swap devices available, so that the paging and swap-
     ping activity is interleaved across several devices.

     Normally, the first form is used:

     --aa      All devices marked as ``sw'' swap devices in _/_e_t_c_/_f_s_t_a_b are made
             available.

     The second form gives individual block devices as given in the system
     swap configuration table.  The call makes only this space available to
     the system for swap allocation.

SSEEEE AALLSSOO
     swapon(2),  fstab(8) init(8) rc(8)

FFIILLEESS
     /dev/[ru][pk]?b  standard paging devices
     /etc/fstab       ascii filesystem description table

BBUUGGSS
     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.

HHIISSTTOORRYY
     The sswwaappoonn command appeared in 4.0BSD.

4th Berkeley Distribution        June 5, 1993                                1