drum(4) [netbsd man page]

DRUM(4) 						   BSD Kernel Interfaces Manual 						   DRUM(4)

NAME

     drum -- paging device

DESCRIPTION

     This file refers to the paging device in use by the system.  This may actually be a subdevice of one of the disk drivers, but in a system
     with paging interleaved across multiple disk drives it provides an indirect driver for the multiple drives.

FILES

     /dev/drum

HISTORY

     The drum special file appeared in 3.0BSD.

BUGS

     Reads from the drum are not allowed across the interleaving boundaries.  Since these only occur every .5Mbytes or so, and since the system
     never allocates blocks across the boundary, this is usually not a problem.

BSD
								   June 5, 1993 							       BSD

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

NAME

       swapon - specify additional device for paging and swapping

SYNOPSIS

       swapon -a
       swapon name ...

DESCRIPTION

       Swapon  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 swapon normally occur in the system multi-user initial-
       ization file /etc/rc making all swap devices available, so that the paging and swapping activity is interleaved across several devices.

       Normally, the -a argument is given, causing all devices marked as ``sw'' swap devices in /etc/fstab to be 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.

SEE ALSO

       swapon(2), init(8)

FILES

       /dev/[ru][pk]?b	   normal paging devices

BUGS

       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  dur-
       ing system operation.

       swapon is not implemented in 2.11BSD.

4th Berkeley Distribution					 November 17, 1996							 SWAPON(8)