Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.sys.mac.apps > #32584 > unrolled thread

Encrypt existing Time Machine backups?

Started byANTant@zimage.com (Ant)
First post2015-10-11 12:37 -0500
Last post2015-10-12 03:04 +0000
Articles 20 on this page of 30 — 7 participants

Back to article view | Back to comp.sys.mac.apps

Contents

  Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 12:37 -0500
    Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-11 17:45 +0000
      Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-11 13:57 -0400
        Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 13:05 -0500
        Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-11 18:07 +0000
          Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 13:11 -0500
            Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-11 18:17 +0000
              Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 14:07 -0500
                Re: Encrypt existing Time Machine backups? nmassello@yahoo.com (Neill Massello) - 2015-10-11 15:16 -0600
                  Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-11 17:37 -0400
                  Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 17:48 -0500
                    Re: Encrypt existing Time Machine backups? nospam <nospam@nospam.invalid> - 2015-10-11 18:53 -0400
                      Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 17:58 -0500
                      Re: Encrypt existing Time Machine backups? nmassello@yahoo.com (Neill Massello) - 2015-10-12 00:38 -0600
                        Re: Encrypt existing Time Machine backups? nospam <nospam@nospam.invalid> - 2015-10-12 12:01 -0400
                    Re: Encrypt existing Time Machine backups? nmassello@yahoo.com (Neill Massello) - 2015-10-12 00:38 -0600
                      Re: Encrypt existing Time Machine backups? nospam <nospam@nospam.invalid> - 2015-10-12 12:01 -0400
                  Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 17:52 -0500
                    Re: Encrypt existing Time Machine backups? John Somerset <somerset@nospam.com> - 2015-10-11 19:56 -0400
                      Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-12 08:58 -0400
                        Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-12 09:54 -0400
                          Re: Encrypt existing Time Machine backups? John Somerset <somerset@nospam.com> - 2015-10-12 16:15 -0400
                            Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-12 21:32 +0000
                              Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-12 17:39 -0400
                            Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-12 17:38 -0400
                              Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-12 22:27 +0000
                    Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-12 02:31 +0000
                      Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-13 01:58 -0500
                        Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-13 07:09 +0000
                  Re: Encrypt existing Time Machine backups? Lewis <g.kreme@gmail.com.dontsendmecopies> - 2015-10-12 03:04 +0000

Page 1 of 2  [1] 2  Next page →

#32584 — Encrypt existing Time Machine backups?

FromANTant@zimage.com (Ant)
Date2015-10-11 12:37 -0500
SubjectEncrypt existing Time Machine backups?
Message-ID<WoadncwDy46iA4fLnZ2dnUU7-SmdnZ2d@earthlink.com>
Hello.

I cannot seem to find this option anywhere in Mac OS X v10.8.5. I 
already encrypted the new SSD last weekend, but the external USB2 HDDs 
are not encrypted. I'd like to encrypt them too.

Thank you in advance. :)
-- 
Quote of the Week: "The eyeless ant asked God, 'Give me eye-lashes.'" --Georgian Proverb
Note: A fixed width font (Courier, Monospace, etc.) is required to see this signature correctly.
  /\___/\   Ant(Dude) @ http://antfarm.home.dhs.org (Personal Web Site)
 / /\ /\ \                 Ant's Quality Foraged Links: http://aqfl.net
| |o   o| |
   \ _ /    Please nuke ANT if replying by e-mail privately. If credit-
    ( )     ing, then please kindly use Ant nickname and AQFL URL/link.

[toc] | [next] | [standalone]

#32585

FromJolly Roger <jollyroger@pobox.com>
Date2015-10-11 17:45 +0000
Message-ID<d7vlh9Fdl0vU1@mid.individual.net>
In reply to#32584
Ant <ANTant@zimage.com> wrote:
> Hello.
> 
> I cannot seem to find this option anywhere in Mac OS X v10.8.5. I 
> already encrypted the new SSD last weekend, but the external USB2 HDDs 
> are not encrypted. I'd like to encrypt them too.
> 
> Thank you in advance. :)

System Preferences > Time Machine > Options > Encrypt backup disk.

-- 
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR

[toc] | [prev] | [next] | [standalone]

#32586

FromAlan Browne <alan.browne@freelunchvideotron.ca>
Date2015-10-11 13:57 -0400
Message-ID<JeudnbKe3tK6PofLnZ2dnUU7-SudnZ2d@giganews.com>
In reply to#32585
On 2015-10-11 13:45, Jolly Roger wrote:
> Ant <ANTant@zimage.com> wrote:
>> Hello.
>>
>> I cannot seem to find this option anywhere in Mac OS X v10.8.5. I
>> already encrypted the new SSD last weekend, but the external USB2 HDDs
>> are not encrypted. I'd like to encrypt them too.
>>
>> Thank you in advance. :)
>
> System Preferences > Time Machine > Options > Encrypt backup disk.

No option for that there that I see ... OTOH, mine are already encrypted 
so maybe the option is removed.

[toc] | [prev] | [next] | [standalone]

#32587

FromANTant@zimage.com (Ant)
Date2015-10-11 13:05 -0500
Message-ID<JsidnQFK9d9GOYfLnZ2dnUU7-TGdnZ2d@earthlink.com>
In reply to#32586
> >> Hello.
> >>
> >> I cannot seem to find this option anywhere in Mac OS X v10.8.5. I
> >> already encrypted the new SSD last weekend, but the external USB2 HDDs
> >> are not encrypted. I'd like to encrypt them too.
> >>
> >> Thank you in advance. :)
> >
> > System Preferences > Time Machine > Options > Encrypt backup disk.

> No option for that there that I see ... OTOH, mine are already encrypted 
> so maybe the option is removed.

Yeah, I don't see it too even if TM backups are unencrypted. :(
-- 
Quote of the Week: "The eyeless ant asked God, 'Give me eye-lashes.'" --Georgian Proverb
Note: A fixed width font (Courier, Monospace, etc.) is required to see this signature correctly.
  /\___/\   Ant(Dude) @ http://antfarm.home.dhs.org (Personal Web Site)
 / /\ /\ \                 Ant's Quality Foraged Links: http://aqfl.net
| |o   o| |
   \ _ /    Please nuke ANT if replying by e-mail privately. If credit-
    ( )     ing, then please kindly use Ant nickname and AQFL URL/link.

[toc] | [prev] | [next] | [standalone]

#32588

FromJolly Roger <jollyroger@pobox.com>
Date2015-10-11 18:07 +0000
Message-ID<d7vmqtFdvs6U1@mid.individual.net>
In reply to#32586
Alan Browne <alan.browne@freelunchvideotron.ca> wrote:
> On 2015-10-11 13:45, Jolly Roger wrote:
>> Ant <ANTant@zimage.com> wrote:
>>> Hello.
>>> 
>>> I cannot seem to find this option anywhere in Mac OS X v10.8.5. I
>>> already encrypted the new SSD last weekend, but the external USB2 HDDs
>>> are not encrypted. I'd like to encrypt them too.
>>> 
>>> Thank you in advance. :)
>> 
>> System Preferences > Time Machine > Options > Encrypt backup disk.
> 
> No option for that there that I see ... OTOH, mine are already encrypted 
> so maybe the option is removed.

Looks like the option was removed, so instead you remove and re-add the
volume:

<https://support.apple.com/kb/PH14202?locale=en_US>

-- 
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR

[toc] | [prev] | [next] | [standalone]

#32589

FromANTant@zimage.com (Ant)
Date2015-10-11 13:11 -0500
Message-ID<JsidnQBK9d-lO4fLnZ2dnUU7-TGdnZ2d@earthlink.com>
In reply to#32588
> >>> I cannot seem to find this option anywhere in Mac OS X v10.8.5. I
> >>> already encrypted the new SSD last weekend, but the external USB2 HDDs
> >>> are not encrypted. I'd like to encrypt them too.
> >>> 
> >>> Thank you in advance. :)
> >> 
> >> System Preferences > Time Machine > Options > Encrypt backup disk.
> > 
> > No option for that there that I see ... OTOH, mine are already encrypted 
> > so maybe the option is removed.

> Looks like the option was removed, so instead you remove and re-add the
> volume:

> <https://support.apple.com/kb/PH14202?locale=en_US>

So basically, make a new TM backup from scratch? :(
-- 
Quote of the Week: "The eyeless ant asked God, 'Give me eye-lashes.'" --Georgian Proverb
Note: A fixed width font (Courier, Monospace, etc.) is required to see this signature correctly.
  /\___/\   Ant(Dude) @ http://antfarm.home.dhs.org (Personal Web Site)
 / /\ /\ \                 Ant's Quality Foraged Links: http://aqfl.net
| |o   o| |
   \ _ /    Please nuke ANT if replying by e-mail privately. If credit-
    ( )     ing, then please kindly use Ant nickname and AQFL URL/link.

[toc] | [prev] | [next] | [standalone]

#32590

FromJolly Roger <jollyroger@pobox.com>
Date2015-10-11 18:17 +0000
Message-ID<d7vnecFe519U1@mid.individual.net>
In reply to#32589
Ant <ANTant@zimage.com> wrote:
>>>>> I cannot seem to find this option anywhere in Mac OS X v10.8.5. I
>>>>> already encrypted the new SSD last weekend, but the external USB2 HDDs
>>>>> are not encrypted. I'd like to encrypt them too.
>>>>> 
>>>>> Thank you in advance. :)
>>>> 
>>>> System Preferences > Time Machine > Options > Encrypt backup disk.
>>> 
>>> No option for that there that I see ... OTOH, mine are already encrypted 
>>> so maybe the option is removed.
> 
>> Looks like the option was removed, so instead you remove and re-add the
>> volume:
> 
>> <https://support.apple.com/kb/PH14202?locale=en_US>
> 
> So basically, make a new TM backup from scratch? :(

No. Removing a volume from the list does not erase backups already on the
volume.

-- 
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR

[toc] | [prev] | [next] | [standalone]

#32591

FromANTant@zimage.com (Ant)
Date2015-10-11 14:07 -0500
Message-ID<cYKdncTRMJ_uLofLnZ2dnUU7-UednZ2d@earthlink.com>
In reply to#32590
> >>>>> I cannot seem to find this option anywhere in Mac OS X v10.8.5. I
> >>>>> already encrypted the new SSD last weekend, but the external USB2 HDDs
> >>>>> are not encrypted. I'd like to encrypt them too.
> >>>>> 
> >>>>> Thank you in advance. :)
> >>>> 
> >>>> System Preferences > Time Machine > Options > Encrypt backup disk.
> >>> 
> >>> No option for that there that I see ... OTOH, mine are already encrypted 
> >>> so maybe the option is removed.
> > 
> >> Looks like the option was removed, so instead you remove and re-add the
> >> volume:
> > 
> >> <https://support.apple.com/kb/PH14202?locale=en_US>
> > 
> > So basically, make a new TM backup from scratch? :(

> No. Removing a volume from the list does not erase backups already on the
> volume.

Oh. I'll try that then.
-- 
Quote of the Week: "The eyeless ant asked God, 'Give me eye-lashes.'" --Georgian Proverb
Note: A fixed width font (Courier, Monospace, etc.) is required to see this signature correctly.
  /\___/\   Ant(Dude) @ http://antfarm.home.dhs.org (Personal Web Site)
 / /\ /\ \                 Ant's Quality Foraged Links: http://aqfl.net
| |o   o| |
   \ _ /    Please nuke ANT if replying by e-mail privately. If credit-
    ( )     ing, then please kindly use Ant nickname and AQFL URL/link.

[toc] | [prev] | [next] | [standalone]

#32592

Fromnmassello@yahoo.com (Neill Massello)
Date2015-10-11 15:16 -0600
Message-ID<1mc4v7w.18agada1f1q1iwN%nmassello@yahoo.com>
In reply to#32591
Ant <ANTant@zimage.com> wrote:

> Oh. I'll try that then.

Just be aware that doing so will convert the Time Machine disk into a
CoreStorage volume that can't be repartitioned with the Disk Utility
app. You'll have to use the diskutil command in Terminal.

[toc] | [prev] | [next] | [standalone]

#32593

FromAlan Browne <alan.browne@freelunchvideotron.ca>
Date2015-10-11 17:37 -0400
Message-ID<R5adnVmBYKYUS4fLnZ2dnUU7-eOdnZ2d@giganews.com>
In reply to#32592
On 2015-10-11 17:16, Neill Massello wrote:
> Ant <ANTant@zimage.com> wrote:
>
>> Oh. I'll try that then.
>
> Just be aware that doing so will convert the Time Machine disk into a
> CoreStorage volume that can't be repartitioned with the Disk Utility
> app. You'll have to use the diskutil command in Terminal.

Be that as it may, I don't recall the last time I partitioned an 
external drive.  Possibly back when I had an iOmega enclosure with two 
disks and I split one into two partitions for some reason now forgotten.

[toc] | [prev] | [next] | [standalone]

#32594

FromANTant@zimage.com (Ant)
Date2015-10-11 17:48 -0500
Message-ID<zZSdnYP6ecjTeofLnZ2dnUU7-XWdnZ2d@earthlink.com>
In reply to#32592
In comp.sys.mac.apps Neill Massello <nmassello@yahoo.com> wrote:
> Ant <ANTant@zimage.com> wrote:

> > Oh. I'll try that then.

> Just be aware that doing so will convert the Time Machine disk into a
> CoreStorage volume that can't be repartitioned with the Disk Utility
> app. You'll have to use the diskutil command in Terminal. 

Um, this sort of went over my head. What did you mean by that? No 
partitions for the whole external USB2 HDD? Currently, there are 2 
partitions (HFS+ [TM backups] and FAT32 [portability to access files 
on any devices]).
-- 
Quote of the Week: "The eyeless ant asked God, 'Give me eye-lashes.'" --Georgian Proverb
Note: A fixed width font (Courier, Monospace, etc.) is required to see this signature correctly.
  /\___/\   Ant(Dude) @ http://antfarm.home.dhs.org (Personal Web Site)
 / /\ /\ \                 Ant's Quality Foraged Links: http://aqfl.net
| |o   o| |
   \ _ /    Please nuke ANT if replying by e-mail privately. If credit-
    ( )     ing, then please kindly use Ant nickname and AQFL URL/link.

[toc] | [prev] | [next] | [standalone]

#32596

Fromnospam <nospam@nospam.invalid>
Date2015-10-11 18:53 -0400
Message-ID<111020151853471626%nospam@nospam.invalid>
In reply to#32594
In article <zZSdnYP6ecjTeofLnZ2dnUU7-XWdnZ2d@earthlink.com>, Ant
<ANTant@zimage.com> wrote:

> > Just be aware that doing so will convert the Time Machine disk into a
> > CoreStorage volume that can't be repartitioned with the Disk Utility
> > app. You'll have to use the diskutil command in Terminal. 
> 
> Um, this sort of went over my head. What did you mean by that? No 
> partitions for the whole external USB2 HDD? Currently, there are 2 
> partitions (HFS+ [TM backups] and FAT32 [portability to access files 
> on any devices]).

don't worry about it. it's wrong.

a core storage volume can be partitioned with disk utility, without
using terminal.

[toc] | [prev] | [next] | [standalone]

#32597

FromANTant@zimage.com (Ant)
Date2015-10-11 17:58 -0500
Message-ID<zZSdnb36ecg7dIfLnZ2dnUU7-XWdnZ2d@earthlink.com>
In reply to#32596
In comp.sys.mac.apps nospam <nospam@nospam.invalid> wrote:
> In article <zZSdnYP6ecjTeofLnZ2dnUU7-XWdnZ2d@earthlink.com>, Ant
> <ANTant@zimage.com> wrote:

> > > Just be aware that doing so will convert the Time Machine disk into a
> > > CoreStorage volume that can't be repartitioned with the Disk Utility
> > > app. You'll have to use the diskutil command in Terminal. 
> > 
> > Um, this sort of went over my head. What did you mean by that? No 
> > partitions for the whole external USB2 HDD? Currently, there are 2 
> > partitions (HFS+ [TM backups] and FAT32 [portability to access files 
> > on any devices]).

> don't worry about it. it's wrong.

> a core storage volume can be partitioned with disk utility, without
> using terminal.

OK.
-- 
Quote of the Week: "The eyeless ant asked God, 'Give me eye-lashes.'" --Georgian Proverb
Note: A fixed width font (Courier, Monospace, etc.) is required to see this signature correctly.
  /\___/\   Ant(Dude) @ http://antfarm.home.dhs.org (Personal Web Site)
 / /\ /\ \                 Ant's Quality Foraged Links: http://aqfl.net
| |o   o| |
   \ _ /    Please nuke ANT if replying by e-mail privately. If credit-
    ( )     ing, then please kindly use Ant nickname and AQFL URL/link.

[toc] | [prev] | [next] | [standalone]

#32602

Fromnmassello@yahoo.com (Neill Massello)
Date2015-10-12 00:38 -0600
Message-ID<1mc5lk5.1qzvm1un3cxhcN%nmassello@yahoo.com>
In reply to#32596
nospam <nospam@nospam.invalid> wrote:

> a core storage volume can be partitioned with disk utility, without
> using terminal.

Not in 10.8, which is the OP's OS version.

[toc] | [prev] | [next] | [standalone]

#32606

Fromnospam <nospam@nospam.invalid>
Date2015-10-12 12:01 -0400
Message-ID<121020151201258456%nospam@nospam.invalid>
In reply to#32602
In article <1mc5lk5.1qzvm1un3cxhcN%nmassello@yahoo.com>, Neill Massello
<nmassello@yahoo.com> wrote:

> 
> > a core storage volume can be partitioned with disk utility, without
> > using terminal.
> 
> Not in 10.8, which is the OP's OS version. 

yes in 10.8. i've done it. 

however, it's limited to two partitions.

[toc] | [prev] | [next] | [standalone]

#32601

Fromnmassello@yahoo.com (Neill Massello)
Date2015-10-12 00:38 -0600
Message-ID<1mc5l5c.8g814yuc3xhsN%nmassello@yahoo.com>
In reply to#32594
Ant <ANTant@zimage.com> wrote:

> Um, this sort of went over my head. What did you mean by that? No 
> partitions for the whole external USB2 HDD? Currently, there are 2 
> partitions (HFS+ [TM backups] and FAT32 [portability to access files 
> on any devices]).

Read the thread "TM volume supposed to have a second partition" from
comp.sys.mac.system in October 2012. I don't know how 10.8.5 will handle
TM encryption on a disk that also contains a FAT32 partition; but for a
standard Mac disk (GUID scheme with an HFS+ partition), you won't be
able to use 10.8's Disk Utility to repartition the disk after you have
enabled encryption on it. This flaw in Disk Utility seems to have been
fixed after 10.8.

[toc] | [prev] | [next] | [standalone]

#32605

Fromnospam <nospam@nospam.invalid>
Date2015-10-12 12:01 -0400
Message-ID<121020151201248421%nospam@nospam.invalid>
In reply to#32601
In article <1mc5l5c.8g814yuc3xhsN%nmassello@yahoo.com>, Neill Massello
<nmassello@yahoo.com> wrote:

> > Um, this sort of went over my head. What did you mean by that? No 
> > partitions for the whole external USB2 HDD? Currently, there are 2 
> > partitions (HFS+ [TM backups] and FAT32 [portability to access files 
> > on any devices]).
> 
> Read the thread "TM volume supposed to have a second partition" from
> comp.sys.mac.system in October 2012. I don't know how 10.8.5 will handle
> TM encryption on a disk that also contains a FAT32 partition; but for a
> standard Mac disk (GUID scheme with an HFS+ partition), you won't be
> able to use 10.8's Disk Utility to repartition the disk after you have
> enabled encryption on it. This flaw in Disk Utility seems to have been
> fixed after 10.8. 

false. 

it's very easy to partition an encrypted volume with disk utility. i've
done it several times.

the only issue is it's limited to two partitions.

[toc] | [prev] | [next] | [standalone]

#32595

FromANTant@zimage.com (Ant)
Date2015-10-11 17:52 -0500
Message-ID<zZSdnYL6eciIdYfLnZ2dnUU7-XWdnZ2d@earthlink.com>
In reply to#32592
In comp.sys.mac.apps Neill Massello <nmassello@yahoo.com> wrote:
> Ant <ANTant@zimage.com> wrote:

> > Oh. I'll try that then.

> Just be aware that doing so will convert the Time Machine disk into a
> CoreStorage volume that can't be repartitioned with the Disk Utility
> app. You'll have to use the diskutil command in Terminal. 

Also, is this true from 
https://discussions.apple.com/message/29093757#29093757's post about 
encrypted TMs making things harder to be portable, recover, etc.?:

"Potentially.  Hard disks are glacial, which means the encryption isn't 
that much of an added burden.   The usual trade-offs are the loss of 
keys, difficulties with portability across operating systems, and the 
need for a long and random key for reasonable security."
-- 
Quote of the Week: "The eyeless ant asked God, 'Give me eye-lashes.'" --Georgian Proverb
Note: A fixed width font (Courier, Monospace, etc.) is required to see this signature correctly.
  /\___/\   Ant(Dude) @ http://antfarm.home.dhs.org (Personal Web Site)
 / /\ /\ \                 Ant's Quality Foraged Links: http://aqfl.net
| |o   o| |
   \ _ /    Please nuke ANT if replying by e-mail privately. If credit-
    ( )     ing, then please kindly use Ant nickname and AQFL URL/link.

[toc] | [prev] | [next] | [standalone]

#32598

FromJohn Somerset <somerset@nospam.com>
Date2015-10-11 19:56 -0400
Message-ID<mvesrs$7l4$1@dont-email.me>
In reply to#32595
On 10/11/15 6:52 PM, Ant wrote:
> In comp.sys.mac.apps Neill Massello <nmassello@yahoo.com> wrote:
>> Ant <ANTant@zimage.com> wrote:
>
>>> Oh. I'll try that then.
>
>> Just be aware that doing so will convert the Time Machine disk into a
>> CoreStorage volume that can't be repartitioned with the Disk Utility
>> app. You'll have to use the diskutil command in Terminal.
>
> Also, is this true from
> https://discussions.apple.com/message/29093757#29093757's post about
> encrypted TMs making things harder to be portable, recover, etc.?:
>
> "Potentially.  Hard disks are glacial, which means the encryption isn't
> that much of an added burden.   The usual trade-offs are the loss of
> keys, difficulties with portability across operating systems, and the
> need for a long and random key for reasonable security."
>
Oh, I thought that encrypting a disk, as with Filevault, meant the whole 
disk had to be unencrypted to work. If memory can grab only what it 
needs, that sounds much faster.

I found the encryption option in the preferences of TM in El Capitan. 
It was greyed, so I guess I'd have to do what JR said.

[toc] | [prev] | [next] | [standalone]

#32603

FromAlan Browne <alan.browne@freelunchvideotron.ca>
Date2015-10-12 08:58 -0400
Message-ID<6Kmdne4aRMfDM4bLnZ2dnUU7-d-dnZ2d@giganews.com>
In reply to#32598
On 2015-10-11 19:56, John Somerset wrote:
> On 10/11/15 6:52 PM, Ant wrote:
>> In comp.sys.mac.apps Neill Massello <nmassello@yahoo.com> wrote:
>>> Ant <ANTant@zimage.com> wrote:
>>
>>>> Oh. I'll try that then.
>>
>>> Just be aware that doing so will convert the Time Machine disk into a
>>> CoreStorage volume that can't be repartitioned with the Disk Utility
>>> app. You'll have to use the diskutil command in Terminal.
>>
>> Also, is this true from
>> https://discussions.apple.com/message/29093757#29093757's post about
>> encrypted TMs making things harder to be portable, recover, etc.?:
>>
>> "Potentially.  Hard disks are glacial, which means the encryption isn't
>> that much of an added burden.   The usual trade-offs are the loss of
>> keys, difficulties with portability across operating systems, and the
>> need for a long and random key for reasonable security."
>>
> Oh, I thought that encrypting a disk, as with Filevault, meant the whole
> disk had to be unencrypted to work. If memory can grab only what it
> needs, that sounds much faster.

When FileVault is started it encrypts every known file on the disk, it 
does not encrypt unused disk space.  This happens quietly in the background.

If you're encrypting a re-purposed disk that had deleted files that you 
want to be sure cannot be recovered, then you should 'erase' the disk in 
disk utility first.  The lowest level of security is adequate.

If you're encrypting a disk with data on it that you don't want to use, 
and it has deleted files on it, then you could random fill the empty 
space to be sure old deleted files are actually written over (empty the 
trash first).

> I found the encryption option in the preferences of TM in El Capitan. It
> was greyed, so I guess I'd have to do what JR said.

[toc] | [prev] | [next] | [standalone]

Page 1 of 2  [1] 2  Next page →

Back to top | Article view | comp.sys.mac.apps

csiph-web