[unix-history] / usr / src / share / man / man4 / drum.4

.\" Copyright (c) 1980 Regents of the University of California.
.\" All rights reserved.  The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\"
.\"	@(#)drum.4	6.1 (Berkeley) %G%
.\"
.TH DRUM 4 ""
.UC 4
.SH NAME
drum \- paging device
.SH 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.
.SH FILES
/dev/drum
.SH BUGS
Reads from the drum are not allowed across the interleaving boundaries.
Since these only occur every
.BR . 5Mbytes
or so,
and since the system never allocates blocks across the boundary,
this is usually not a problem.
Commit	Line	Data
51eec7de KM	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	.\"
41aba267	5	.\" @(#)drum.4 6.1 (Berkeley) %G%
51eec7de	6	.\"
41aba267	7	.TH DRUM 4 ""
51eec7de KM	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.