sparsebundle & sparseimage -- what's the difference?

[paint...@gmail.com]

I've created sparsebundles using:

hdiutil create -type SPARSEBUNDLE -fs HFS+ -size 4.33G -volname
Music Music

but when I try creating a sparseimage with:

hdiutil create -type SPARSE -fs HFS+ -size 1G -volname ES ES

I get all kinds of errors (which nobody needs to read -- see below)
but then it seems to create the sparseimage after all.

I've tried to use the sparseimage because it provides for encryption
(which, I could be wrong, is not available for sparsebundles?).

It is really the issue of encryption that I am interested in and if
both provide it. However, I've only seen examples of the -encryption
argument with sparseimages.

Thanks for any help.

008-10-06 00:03:06.209 hdiutil[2623:10b] Error loading
/Users/paintedjazz/Library/Plug-ins/DiskImages/
VirtualPCDiskImagePlugin.bundle/C
ontents/MacOS/VirtualPCDiskImagePlugin:
dlopen(/Users/paintedjazz/Library/Plug-ins/DiskImages/
VirtualPCDiskImagePlugin.b
undle/Contents/MacOS/VirtualPCDiskImagePlugin, 262): no suitable image
found. D
id
find:

/Users/paintedjazz/Library/Plug-ins/DiskImages/
VirtualPCDiskImagePlugin.bundle/C
ontents/MacOS/VirtualPCDiskImagePlugin: mach-o, but wrong architecture
2008-10-06 00:03:06.215 hdiutil[2623:10b] Cannot find function pointer
MacDiskImagePluginFactory for factory
4D08F98C-8968-11D6-8667-0003933E9206 in
CFBundle/CFPlugIn 0x41c2d0
</Users/paintedjazz/Library/Plug-ins/DiskImages/
VirtualPCDiskImagePlugin.bundle>
(bundle, not loaded)
2008-10-06 00:03:06.587 diskimages-helper[2625:1603] Error loading
/Users/paintedjazz/Library/Plug-ins/DiskImages/
VirtualPCDiskImagePlugin.bundle/C
ontents/MacOS/VirtualPCDiskImagePlugin:
dlopen(/Users/paintedjazz/Library/Plug-ins/DiskImages/
VirtualPCDiskImagePlugin.b
undle/Contents/MacOS/VirtualPCDiskImagePlugin, 262): no suitable image
found. D
id
find:

/Users/paintedjazz/Library/Plug-ins/DiskImages/
VirtualPCDiskImagePlugin.bundle/C
ontents/MacOS/VirtualPCDiskImagePlugin: mach-o, but wrong architecture
2008-10-06 00:03:06.594 diskimages-helper[2625:1603] Cannot find
function
pointer MacDiskImagePluginFactory for factory
4D08F98C-8968-11D6-8667-0003933E9206 in CFBundle/CFPlugIn 0x524cd0
</Users/paintedjazz/Library/Plug-ins/DiskImages/
VirtualPCDiskImagePlugin.bundle>
(bundle, not loaded)
2008-10-06 00:03:06.633 diskimages-helper[2625:1603] Error loading
/Users/paintedjazz/Library/Plug-ins/DiskImages/
VirtualPCDiskImagePlugin.bundle/C
ontents/MacOS/VirtualPCDiskImagePlugin:
dlopen(/Users/paintedjazz/Library/Plug-ins/DiskImages/
VirtualPCDiskImagePlugin.b
undle/Contents/MacOS/VirtualPCDiskImagePlugin, 262): no suitable image
found. D
id
find:

/Users/paintedjazz/Library/Plug-ins/DiskImages/
VirtualPCDiskImagePlugin.bundle/C
ontents/MacOS/VirtualPCDiskImagePlugin: mach-o, but wrong architecture
2008-10-06 00:03:06.634 diskimages-helper[2625:1603] Cannot find
function
pointer MacDiskImagePluginFactory for factory
4D08F98C-8968-11D6-8667-0003933E9206 in CFBundle/CFPlugIn 0x524cd0
</Users/paintedjazz/Library/Plug-ins/DiskImages/
VirtualPCDiskImagePlugin.bundle>
(bundle, not loaded)
created: /Users/paintedjazz/ES.sparseimage

[Nick Naym]

In article
b928e325-632d-4bd9...@t42g2000hsg.googlegroups.com,
paint...@gmail.com at paint...@gmail.com wrote on 10/6/08 3:10 AM:

> I've created sparsebundles using:
>
> hdiutil create -type SPARSEBUNDLE -fs HFS+ -size 4.33G -volname
> Music Music
>
> but when I try creating a sparseimage with:
>
> hdiutil create -type SPARSE -fs HFS+ -size 1G -volname ES ES
>
> I get all kinds of errors (which nobody needs to read -- see below)
> but then it seems to create the sparseimage after all.
>
> I've tried to use the sparseimage because it provides for encryption
> (which, I could be wrong, is not available for sparsebundles?).
>
> It is really the issue of encryption that I am interested in and if
> both provide it. However, I've only seen examples of the -encryption
> argument with sparseimages.
>
> Thanks for any help.
>
>

AFAIK, a sparse bundle looks and acts just like a sparse image (it can be
encrypted, compressed, etc.)

--
iMac (24", 2.8 GHz Intel Core 2 Duo, 2GB RAM, 320 GB HDD) € OS X (10.5.4)

[Király]

Nick Naym <nicknaym@[remove_this].gmail.com> wrote:
> AFAIK, a sparse bundle looks and acts just like a sparse image (it can be
> encrypted, compressed, etc.)

That's true. But the main advantage of sparse bundles is backing them
up with Time Machine or another archival backup program.

If you have a 1GB sparse image, adding a 1MB file to it will result
in the entire 1GB image to be backed up again. This can cause a backup
drive to fill up very quicky.

A sparse bundle is actually a folder with many enclosed chunks of files
called 'bands'. Typically each band is a few MB in size. Adding a 1MB
file will only change one band or possibly create another one, so that
only that one band needs to be backed up instead of the whole shebang.

Data in both types can be protected with the same strong encryption.

--
K.

Lang may your lum reek.

[Nick Naym]

In article OlsGk.1038$DK3.498@edtnps82, Király at m...@home.spamsucks.ca wrote
on 10/6/08 1:59 PM:

> Nick Naym <nicknaym@[remove_this].gmail.com> wrote:
>> AFAIK, a sparse bundle looks and acts just like a sparse image (it can be
>> encrypted, compressed, etc.)
>
> That's true. But the main advantage of sparse bundles is backing them
> up with Time Machine or another archival backup program.

Which is (IIRC) why Apple created it as a sparseimage replacement.

>
> If you have a 1GB sparse image, adding a 1MB file to it will result
> in the entire 1GB image to be backed up again. This can cause a backup
> drive to fill up very quicky.
>
> A sparse bundle is actually a folder with many enclosed chunks of files
> called 'bands'. Typically each band is a few MB in size. Adding a 1MB
> file will only change one band or possibly create another one, so that
> only that one band needs to be backed up instead of the whole shebang.
>
> Data in both types can be protected with the same strong encryption.

--