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1 | c101c49c | bellard | .\" $Header: /home/paul/qemu/svnmerge/qemu-cvs/qemu/qemu-mkcow.1,v 1.1 2004-03-26 22:42:54 bellard Exp $ |
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2 | c101c49c | bellard | .\" |
3 | c101c49c | bellard | .\" transcript compatibility for postscript use. |
4 | c101c49c | bellard | .\" |
5 | c101c49c | bellard | .\" synopsis: .P! <file.ps> |
6 | c101c49c | bellard | .\" |
7 | c101c49c | bellard | .de P! |
8 | c101c49c | bellard | .fl |
9 | c101c49c | bellard | \!!1 setgray |
10 | c101c49c | bellard | .fl |
11 | c101c49c | bellard | \\&.\" |
12 | c101c49c | bellard | .fl |
13 | c101c49c | bellard | \!!0 setgray |
14 | c101c49c | bellard | .fl \" force out current output buffer |
15 | c101c49c | bellard | \!!save /psv exch def currentpoint translate 0 0 moveto |
16 | c101c49c | bellard | \!!/showpage{}def |
17 | c101c49c | bellard | .fl \" prolog |
18 | c101c49c | bellard | .sy sed -e 's/^/!/' \\$1\" bring in postscript file |
19 | c101c49c | bellard | \!!psv restore |
20 | c101c49c | bellard | . |
21 | c101c49c | bellard | .de pF |
22 | c101c49c | bellard | .ie \\*(f1 .ds f1 \\n(.f |
23 | c101c49c | bellard | .el .ie \\*(f2 .ds f2 \\n(.f |
24 | c101c49c | bellard | .el .ie \\*(f3 .ds f3 \\n(.f |
25 | c101c49c | bellard | .el .ie \\*(f4 .ds f4 \\n(.f |
26 | c101c49c | bellard | .el .tm ? font overflow |
27 | c101c49c | bellard | .ft \\$1 |
28 | c101c49c | bellard | .. |
29 | c101c49c | bellard | .de fP |
30 | c101c49c | bellard | .ie !\\*(f4 \{\ |
31 | c101c49c | bellard | . ft \\*(f4 |
32 | c101c49c | bellard | . ds f4\" |
33 | c101c49c | bellard | ' br \} |
34 | c101c49c | bellard | .el .ie !\\*(f3 \{\ |
35 | c101c49c | bellard | . ft \\*(f3 |
36 | c101c49c | bellard | . ds f3\" |
37 | c101c49c | bellard | ' br \} |
38 | c101c49c | bellard | .el .ie !\\*(f2 \{\ |
39 | c101c49c | bellard | . ft \\*(f2 |
40 | c101c49c | bellard | . ds f2\" |
41 | c101c49c | bellard | ' br \} |
42 | c101c49c | bellard | .el .ie !\\*(f1 \{\ |
43 | c101c49c | bellard | . ft \\*(f1 |
44 | c101c49c | bellard | . ds f1\" |
45 | c101c49c | bellard | ' br \} |
46 | c101c49c | bellard | .el .tm ? font underflow |
47 | c101c49c | bellard | .. |
48 | c101c49c | bellard | .ds f1\" |
49 | c101c49c | bellard | .ds f2\" |
50 | c101c49c | bellard | .ds f3\" |
51 | c101c49c | bellard | .ds f4\" |
52 | c101c49c | bellard | '\" t |
53 | c101c49c | bellard | .ta 8n 16n 24n 32n 40n 48n 56n 64n 72n |
54 | c101c49c | bellard | .TH "QEMU" "8" |
55 | c101c49c | bellard | .SH "NAME" |
56 | c101c49c | bellard | qemu-mkcow \(em create a copy-on-write file for qemu |
57 | c101c49c | bellard | .SH "SYNOPSIS" |
58 | c101c49c | bellard | .PP |
59 | c101c49c | bellard | \fBqemu-mkcow\fR [\fB-h\fP] [\fB-f \fImaster_disk_image\fR\fP] [\fIcow_image\fR] [\fB\fIcow_size\fR\fP] |
60 | c101c49c | bellard | .SH "DESCRIPTION" |
61 | c101c49c | bellard | .PP |
62 | c101c49c | bellard | The \fBqemu-mkcow\fR command creates a |
63 | c101c49c | bellard | persistent copy-on-write file for \fBqemu\fR. |
64 | c101c49c | bellard | |
65 | c101c49c | bellard | .PP |
66 | c101c49c | bellard | \fBqemu\fR can be used in a "copy-on-write" mode, |
67 | c101c49c | bellard | where changes made by \fBqemu\fR do not actually |
68 | c101c49c | bellard | change the disk image file. One way is to invoke |
69 | c101c49c | bellard | \fBqemu\fR with -snapshot: these changes |
70 | c101c49c | bellard | are stored in a temporary file, which is discarded when |
71 | c101c49c | bellard | \fBqemu\fR exits. |
72 | c101c49c | bellard | |
73 | c101c49c | bellard | .PP |
74 | c101c49c | bellard | \fBqemu-mkcow\fR creates an explicit copy-on-write |
75 | c101c49c | bellard | file where changes are to be stored: this way, changes made |
76 | c101c49c | bellard | inside \fBqemu\fR will still be there next time you |
77 | c101c49c | bellard | run it, although the master disk image isn't ever changed. |
78 | c101c49c | bellard | |
79 | c101c49c | bellard | .PP |
80 | c101c49c | bellard | The usual method is to create the master image, then create a |
81 | c101c49c | bellard | copy-on-write file using \fBqemu-mkcow\fR with |
82 | c101c49c | bellard | \fB-f\fP. The filename of the master image is stored |
83 | c101c49c | bellard | inside the generated copy-on-write file: it must not be modified |
84 | c101c49c | bellard | after this is run! |
85 | c101c49c | bellard | |
86 | c101c49c | bellard | .PP |
87 | c101c49c | bellard | If no master file is specified, the effect is that of a |
88 | c101c49c | bellard | blank master of size \fIcow_size\fR. |
89 | c101c49c | bellard | |
90 | c101c49c | bellard | .SH "SEE ALSO" |
91 | c101c49c | bellard | .PP |
92 | c101c49c | bellard | qemu(1), qemu-fast(1). |
93 | c101c49c | bellard | .SH "AUTHOR" |
94 | c101c49c | bellard | .PP |
95 | c101c49c | bellard | This manual page was written by Paul Russell prussell@debian.org for |
96 | c101c49c | bellard | the \fBDebian\fP system (but may be used by others). Permission is |
97 | c101c49c | bellard | granted to copy, distribute and/or modify this document under |
98 | c101c49c | bellard | the terms of the GNU General Public License, Version 2 any |
99 | c101c49c | bellard | later version published by the Free Software Foundation. |
100 | c101c49c | bellard | |
101 | c101c49c | bellard | .PP |
102 | c101c49c | bellard | On Debian systems, the complete text of the GNU General Public |
103 | c101c49c | bellard | License can be found in /usr/share/common-licenses/GPL. |
104 | c101c49c | bellard | |
105 | c101c49c | bellard | .\" created by instant / docbook-to-man, Fri 12 Mar 2004, 05:58 |