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