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56 qemu-mkcow \(em create a copy-on-write file for qemu
59 \fBqemu-mkcow\fR [\fB-h\fP] [\fB-f \fImaster_disk_image\fR\fP] [\fIcow_image\fR] [\fB\fIcow_size\fR\fP]
62 The \fBqemu-mkcow\fR command creates a
63 persistent copy-on-write file for \fBqemu\fR.
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
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.
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
87 If no master file is specified, the effect is that of a
88 blank master of size \fIcow_size\fR.
92 qemu(1), qemu-fast(1).
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.
102 On Debian systems, the complete text of the GNU General Public
103 License can be found in /usr/share/common-licenses/GPL.
105 .\" created by instant / docbook-to-man, Fri 12 Mar 2004, 05:58