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Diffstat (limited to 'qemu-img.texi')
| -rw-r--r-- | qemu-img.texi | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/qemu-img.texi b/qemu-img.texi index ac7923ffd1..1f01dce162 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -29,16 +29,19 @@ is the disk image format. It is guessed automatically in most cases. The followi @item raw Raw disk image format (default). This format has the advantage of -being simple and easily exportable to all other emulators. If your file -system supports @emph{holes} (for example in ext2 or ext3 on Linux), -then only the written sectors will reserve space. Use @code{qemu-img -info} to know the real size used by the image or @code{ls -ls} on -Unix/Linux. +being simple and easily exportable to all other emulators. If your +file system supports @emph{holes} (for example in ext2 or ext3 on +Linux or NTFS on Windows), then only the written sectors will reserve +space. Use @code{qemu-img info} to know the real size used by the +image or @code{ls -ls} on Unix/Linux. -@item qcow +@item qcow2 QEMU image format, the most versatile format. Use it to have smaller images (useful if your filesystem does not supports holes, for example -on Windows), optional AES encryption and zlib based compression. +on Windows), optional AES encryption, zlib based compression and +support of multiple VM snapshots. +@item qcow +Old QEMU image format. Left for compatibility. @item cow User Mode Linux Copy On Write image format. Used to be the only growable image format in QEMU. It is supported only for compatibility with @@ -104,7 +107,8 @@ are detected and suppressed from the destination image. Give information about the disk image @var{filename}. Use it in particular to know the size reserved on disk which can be different -from the displayed size. +from the displayed size. If VM snapshots are stored in the disk image, +they are displayed too. @end table @c man end |