A good encryptor for old Mac OS X 10.2.8?

In comp.sys.mac.system Howard Brazee <howard.RemoveThis@brazee.net> wrote:
> So if I have my encrypted dmg file, I can tell Time Machine to go
> ahead and back it up, and it will automatically not fill up every time
> I change a file within it? Nothing for me to do?

If your image is a sparse *bundle*, then yes.

I have a sparse bundle that is 1.27GB in size. Inside are 87 or so
bands (files) of 16MB each. If I add another 10MB of data to the
image, just one of those bands gets modified, and/or one more band gets
created. The rest of the bands remain intact. So the next time Time
Machine runs, it only needs to add the changed and/or new bands to the
TM backup disk. If this were a regular disk image, TM would add the
whole 1.27GB image file over again.

You should be able to convert your regular sparse image to a sparse
bundle with Disk Utility's Images -> Convert menu item. Or, create a
new empty sparse bundle, move your files to it, and delete your old
image.

--
K.

Lang may your lum reek.

On Tue, 17 Jun 2008 23:01:58 GMT, me.TakeThisOut@home.spamsucks.ca (Király) wrote:

>In comp.sys.mac.system Howard Brazee <howard.TakeThisOut@brazee.net> wrote:
>> So if I have my encrypted dmg file, I can tell Time Machine to go
>> ahead and back it up, and it will automatically not fill up every time
>> I change a file within it? Nothing for me to do?
>
>If your image is a sparse *bundle*, then yes.
>
>I have a sparse bundle that is 1.27GB in size. Inside are 87 or so
>bands (files) of 16MB each. If I add another 10MB of data to the
>image, just one of those bands gets modified, and/or one more band gets
>created. The rest of the bands remain intact. So the next time Time
>Machine runs, it only needs to add the changed and/or new bands to the
>TM backup disk. If this were a regular disk image, TM would add the
>whole 1.27GB image file over again.
>
>You should be able to convert your regular sparse image to a sparse
>bundle with Disk Utility's Images -> Convert menu item. Or, create a
>new empty sparse bundle, move your files to it, and delete your old
>image.

Get Info didn't tell me anything about "sparse", so I'm guessing my
..dmg file is neither. I never heard of that word with regards to OS
X before this thread. I did look up "sparse" in _Mac OS X: The
Missing Manual_, and see that I could have created it with either
option. I suspect I did so with neither option (or else I'd see it in
Get Info).

It doesn't explain when I would want a sparse image, a sparse bundle
disk image, or just a read/write disk image.

Ant <ANTant.RemoveThis@zimage.com> wrote:

> On 6/16/2008 11:01 PM PT, Doug Anderson typed:
>
> >>>> Is that on current HDD or do I have to make new partitions?
> >>> You can save disk images anywhere you want. A disk image is simply a
> >>> file, that mounts a volume as a virtual disk when you open it.
> >> I use an encrypted one on my portable Macs to carry around sensitive
> >> info like credit card numbers. Make sure you use a strong password!
> >
> > Yes. You can store it in the encrypted disk image in case you forget
> > it.
>
> Sweet. I will check it out later. I assume newer Mac OS X is backward
> compatible with it too.

Doug was being facetious, but never mind Encrypted disk images made
in 10.2.8 will work just fine in any later version of OSX.

Regards,
Jamie Kahn Genet
--
If you're not part of the solution, you're part of the precipitate.

In article <v9ng54thvm082vng3bj7fb4mtgvslte661.TakeThisOut@4ax.com>,
Howard Brazee <howard.TakeThisOut@brazee.net> wrote:

> On Tue, 17 Jun 2008 21:07:08 GMT, Tom Stiller <tomstiller.TakeThisOut@yahoo.com>
> wrote:
>
> >> So if I have my encrypted dmg file, I can tell Time Machine to go
> >> ahead and back it up, and it will automatically not fill up every time
> >> I change a file within it? Nothing for me to do?
> >
> >You *did* notice the distinction beteen sparse images and sparse
> >bundles, right?
>
> I'm way to ignorant here.

If you perform "Get Info" on the file in question, it will display the
extension which will probably be either "sparsebundle" or "dmg".

--
Tom Stiller

PGP fingerprint = 5108 DDB2 9761 EDE5 E7E3 7BDA 71ED 6496 99C0 C7CF

On 2008-06-18 02:04:10 +0100, Howard Brazee <howard.DeleteThis@brazee.net> said:

> On Tue, 17 Jun 2008 23:01:58 GMT, me.DeleteThis@home.spamsucks.ca (Király) wrote:
>
>> In comp.sys.mac.system Howard Brazee <howard.DeleteThis@brazee.net> wrote:
>>> So if I have my encrypted dmg file, I can tell Time Machine to go
>>> ahead and back it up, and it will automatically not fill up every time
>>> I change a file within it? Nothing for me to do?
>>
>> If your image is a sparse *bundle*, then yes.
>>
>> I have a sparse bundle that is 1.27GB in size. Inside are 87 or so
>> bands (files) of 16MB each. If I add another 10MB of data to the
>> image, just one of those bands gets modified, and/or one more band gets
>> created. The rest of the bands remain intact. So the next time Time
>> Machine runs, it only needs to add the changed and/or new bands to the
>> TM backup disk. If this were a regular disk image, TM would add the
>> whole 1.27GB image file over again.
>>
>> You should be able to convert your regular sparse image to a sparse
>> bundle with Disk Utility's Images -> Convert menu item. Or, create a
>> new empty sparse bundle, move your files to it, and delete your old
>> image.
>
> Get Info didn't tell me anything about "sparse", so I'm guessing my
> .dmg file is neither. I never heard of that word with regards to OS
> X before this thread. I did look up "sparse" in _Mac OS X: The
> Missing Manual_, and see that I could have created it with either
> option. I suspect I did so with neither option (or else I'd see it in
> Get Info).

Sparse bundles were introduced in Leopard, so old books won't mention them.

Cheers,

Chris

On Wed, 18 Jun 2008 07:20:43 +0100, Chris Ridd <chrisridd.RemoveThis@mac.com>
wrote:

>> Get Info didn't tell me anything about "sparse", so I'm guessing my
>> .dmg file is neither. I never heard of that word with regards to OS
>> X before this thread. I did look up "sparse" in _Mac OS X: The
>> Missing Manual_, and see that I could have created it with either
>> option. I suspect I did so with neither option (or else I'd see it in
>> Get Info).
>
>Sparse bundles were introduced in Leopard, so old books won't mention them.

I suspect that's why it looked like an add-on to the Leopard Edition
book I have. The author probably has already expanded it (at his
leisure) for the next edition of the book.

On 16/06/2008, ANTant.RemoveThis@zimage.com wrote something.

Just a quick heads-up that this message was crossposted between

comp.sys.mac.apps,
comp.sys.mac.hardware.misc,
comp.sys.mac.hardware.storage,
comp.sys.mac.misc,
comp.sys.mac.system

Crossposting inside the c.s.m.* hierarchy is forbidden by the hierarchy
charter. Should you choose to reply, please make sure your response is on-
charter for all the groups you post it to. Thanks for your help.

Simon.
--
http://www.hearsay.demon.co.uk

In comp.sys.mac.apps Simon Slavin <slavins.delete.these.four.words RemoveThis @hearsay.demon.co.uk> wrote:
> On 16/06/2008, ANTant RemoveThis @zimage.com wrote something.
>
> Just a quick heads-up that this message was crossposted between
>
> comp.sys.mac.apps,
> comp.sys.mac.hardware.misc,
> comp.sys.mac.hardware.storage,
> comp.sys.mac.misc,
> comp.sys.mac.system
>
> Crossposting inside the c.s.m.* hierarchy is forbidden by the hierarchy
> charter. Should you choose to reply, please make sure your response is on-
> charter for all the groups you post it to. Thanks for your help.

Sorry about that. I will post a new one to each group individually next
time. I just made another new cross-post a few minutes ago.
--
"We are anthill men upon an anthill world." --Ray Bradbury
/\___/\
/ /\ /\ \ Phillip (Ant) @ http://antfarm.ma.cx (Personal Web Site)
| |o o| | Ant's Quality Foraged Links (AQFL): http://aqfl.net
\ _ / Please remove ANT if replying by e-mail.
( )

This message is not archived

On Tue, 17 Jun 2008 17:17:11 GMT, me RemoveThis @home.spamsucks.ca (Király) wrote:

>You would benefit from using a sparse bundle instead of a sparse image.
>An item added to a sparse bundle will tend to change only a few of the
>embedded bands. When backing up with TM, only the changed bands will be
>added; not the whole thing.

I created a sparse bundle, and thought I made it encrypted - but
apparently I messed up. So I'm trying to find how to turn on
encryption for it without success. Maybe I'll have to create another
one, and copy everything over.