BSD 4_3 release

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

diff --git a/usr/man/man4/drum.4 b/usr/man/man4/drum.4
index 8e528ec..20b9f2b 100644 (file)
--- a/usr/man/man4/drum.4
+++ b/usr/man/man4/drum.4
@@ -1,15 +1,24 @@
-.TH DRUM 4
-.UC
+.\" 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) 5/15/85
+.\"
+.TH DRUM 4 "May 15, 1985"
+.UC 4

 .SH NAME
 drum \- paging device
 .SH NAME
 drum \- paging device

-.SH SYNOPSIS
+.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
 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 spread across multiple disk drives or interleaved
-will be an indirect driver.
+a system with paging interleaved across multiple disk drives
+it provides an indirect driver for the multiple drives.

 .SH FILES
 /dev/drum
 .SH FILES
 /dev/drum

-.SH SEE ALSO
-``Data Structures added in the Berkeley Virtual Memory Extensions to the
-\s-2UNIX\s0 System'' by O. Babaoglu and W. Joy

 .SH BUGS
 .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.