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.\" $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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.ta 8n 16n 24n 32n 40n 48n 56n 64n 72n |
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.TH "QEMU" "8" |
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.SH "NAME" |
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qemu-mkcow \(em create a copy-on-write file for qemu |
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.SH "SYNOPSIS" |
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.PP |
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\fBqemu-mkcow\fR [\fB-h\fP] [\fB-f \fImaster_disk_image\fR\fP] [\fIcow_image\fR] [\fB\fIcow_size\fR\fP] |
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.SH "DESCRIPTION" |
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.PP |
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The \fBqemu-mkcow\fR command creates a |
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persistent copy-on-write file for \fBqemu\fR. |
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.PP |
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\fBqemu\fR can be used in a "copy-on-write" mode, |
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where changes made by \fBqemu\fR do not actually |
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change the disk image file. One way is to invoke |
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\fBqemu\fR with -snapshot: these changes |
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are stored in a temporary file, which is discarded when |
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\fBqemu\fR exits. |
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|
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.PP |
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\fBqemu-mkcow\fR creates an explicit copy-on-write |
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file where changes are to be stored: this way, changes made |
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inside \fBqemu\fR will still be there next time you |
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run it, although the master disk image isn't ever changed. |
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|
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.PP |
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The usual method is to create the master image, then create a |
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copy-on-write file using \fBqemu-mkcow\fR with |
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\fB-f\fP. The filename of the master image is stored |
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inside the generated copy-on-write file: it must not be modified |
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after this is run! |
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|
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.PP |
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If no master file is specified, the effect is that of a |
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blank master of size \fIcow_size\fR. |
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|
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.SH "SEE ALSO" |
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.PP |
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qemu(1), qemu-fast(1). |
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.SH "AUTHOR" |
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.PP |
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This manual page was written by Paul Russell prussell@debian.org for |
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the \fBDebian\fP system (but may be used by others). Permission is |
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granted to copy, distribute and/or modify this document under |
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the terms of the GNU General Public License, Version 2 any |
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later version published by the Free Software Foundation. |
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|
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.PP |
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On Debian systems, the complete text of the GNU General Public |
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License can be found in /usr/share/common-licenses/GPL. |
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.\" created by instant / docbook-to-man, Fri 12 Mar 2004, 05:58 |