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DRUM(4)		       FreeBSD 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.

4th Berkeley Distribution	 June 5, 1993	     4th Berkeley Distribution

NAME | DESCRIPTION | FILES | HISTORY | BUGS

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