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1.1 ! root 1: .\" Copyright (c) 1980 Regents of the University of California. ! 2: .\" All rights reserved. The Berkeley software License Agreement ! 3: .\" specifies the terms and conditions for redistribution. ! 4: .\" ! 5: .\" @(#)drum.4 6.1 (Berkeley) 5/15/85 ! 6: .\" ! 7: .TH DRUM 4 "May 15, 1985" ! 8: .UC 4 ! 9: .SH NAME ! 10: drum \- paging device ! 11: .SH DESCRIPTION ! 12: This file refers to the paging device in use by the system. ! 13: This may actually be a subdevice of one of the disk drivers, but in ! 14: a system with paging interleaved across multiple disk drives ! 15: it provides an indirect driver for the multiple drives. ! 16: .SH FILES ! 17: /dev/drum ! 18: .SH BUGS ! 19: Reads from the drum are not allowed across the interleaving boundaries. ! 20: Since these only occur every ! 21: .BR . 5Mbytes ! 22: or so, ! 23: and since the system never allocates blocks across the boundary, ! 24: this is usually not a problem.
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