Commit 19d36792 authored by bellard's avatar bellard
Browse files

update


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2100 c046a42c-6fe2-441c-8c8c-71466251a162
parent 90765429
......@@ -949,7 +949,7 @@ format. Normally this device is the first virtual hard drive.
Use the monitor command @code{savevm} to create a new VM snapshot or
replace an existing one. A human readable name can be assigned to each
snapshots in addition to its numerical ID.
snapshot in addition to its numerical ID.
Use @code{loadvm} to restore a VM snapshot and @code{delvm} to remove
a VM snapshot. @code{info snapshots} lists the available snapshots
......@@ -972,8 +972,8 @@ and writable block device. The disk image snapshots are stored in
every disk image. The size of a snapshot in a disk image is difficult
to evaluate and is not shown by @code{info snapshots} because the
associated disk sectors are shared among all the snapshots to save
disk space (otherwise each snapshot would have to copy the full disk
images).
disk space (otherwise each snapshot would need a full copy of all the
disk images).
When using the (unrelated) @code{-snapshot} option
(@ref{disk_images_snapshot_mode}), you can always make VM snapshots,
......
......@@ -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
......
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