On Fri, Jun 19, 2009 at 11:23 AM, Zachary Kotlarek <span dir="ltr"><<a href="mailto:zach@kotlarek.com">zach@kotlarek.com</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="im"><br>
On Jun 19, 2009, at 9:11 AM, Tom Pohl wrote:<br>
<br>
> I'd bet TrueCrypt will give you what you're looking for with the added<br>
> benefit of encryption :)<br>
><br>
> <a href="http://www.truecrypt.org/" target="_blank">http://www.truecrypt.org/</a><br>
<br>
<br>
</div>Have they added support for sparse images on non-NTFS parent file<br>
systems? Last I saw you had to be running Windows to use a sparse disk<br>
image, and had to be willing to reveal your sector usage bitmap in<br>
order to do that.<br>
<br>
Regardless, compressed and read-write is a tall order on any OS<br>
(hdiutil doesn't do it either) -- there are several choices for<br>
building disk images on linux, several of which can be used while<br>
compressed, but the only thing I've ever heard of that allows read-<br>
write access to a compressed store is some of the FUSE frontends ZIP<br>
files and the like.<br>
<br>
Zach<br></blockquote></div><br>Maybe "sparse, compressed, read-write" isn't the correct description because I only want to write it once, but hdiutil will create a sparse, compressed disk image from a directory as follows:<br>
<br> hdiutil create -srcfolder my_directory -format UDZO my-diskimage.dmg<br><br>--David<br><br>