Re: El Capitan oddities

Subject	Re: El Capitan oddities
Newsgroups	comp.sys.mac.system
References	(6 earlier) <mv6jjn$ni5$2@dont-email.me> <1mc1073.1tjqeu81n66be1N%dempson@actrix.gen.nz> <mv77ed$ivs$1@dont-email.me> <MYmdna1gtrmhXorLnZ2dnUU7-f-dnZ2d@giganews.com> <mv8qe5$vfn$1@dont-email.me>
From	Alan Browne <alan.browne@freelunchvideotron.ca>
Date	2015-10-09 13:25 -0400
Message-ID	<4eydnb65Up8_ZYrLnZ2dnUU7-RmdnZ2d@giganews.com> (permalink)

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On 2015-10-09 12:38, John Somerset wrote:
> On 10/9/15 9:38 AM, Alan Browne wrote:
>> On 2015-10-08 22:08, John Somerset wrote:
>>
>>> That's it. I've never taken the plunge to automatic backups.
>>
>> Trivially easy.  And once set up and running, all but noticeable in
>> operation, esp. with high speed interfaces (Firewire or faster).
>
> It's a carryover from System 7.  A power interruption could make a disk
> unreadable, IIRC.  I kept my backup drive turned off normally so a power
> problem wouldn't corrupt it along with my internal disk.  Maybe
> journaling has made the risk negligible.

Many things make it negligible.  I've had power failures during writes 
and no issues afterwards other than files that needed to be copied again.

You can also get a UPS to keep your disks up during writes - further, 
they have power failure management s/w to terminate tasks on the mac 
during power failures that last more than x minutes.  (Although I don't 
know how gracefully TM exits if writing at that time.  OTOH, once a TM 
volume is initialized, hourly updates take little time).

>>
>>>
>>> I'm scared of the trouble I might get into if I encrypted my disk.
>>
>> Trivially low risk and removes any "end of disk life" issues wrt
>> destroying data.  Just make a copy of the recovery key and keep in a
>> safe place.
>>
> How does encryption prevent loss of data?
>
> Is the recovery key normally a password created by the user?

No.  It's gen'd by FileVault.  24 chars (similar to a s/w license key).

Note that you would normally keep the Filevault key in your keychain 
which requires password access.  eg: when you log in to your mac, the HD 
Filevault key is retrieved via keychain.

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Re: El Capitan oddities xxx <xxx@yyy.zzz> - 2015-10-08 01:54 -0400
  Re: El Capitan oddities John Somerset <somerset@nospam.com> - 2015-10-08 16:29 -0400
    Re: El Capitan oddities dempson@actrix.gen.nz (David Empson) - 2015-10-09 14:09 +1300
      Re: El Capitan oddities John Somerset <somerset@nospam.com> - 2015-10-08 22:08 -0400
        Re: El Capitan oddities Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-09 09:38 -0400
          Re: El Capitan oddities John Somerset <somerset@nospam.com> - 2015-10-09 12:38 -0400
            Re: El Capitan oddities Jolly Roger <jollyroger@pobox.com> - 2015-10-09 17:08 +0000
            Re: El Capitan oddities Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-09 13:25 -0400
              Re: El Capitan oddities John Somerset <somerset@nospam.com> - 2015-10-09 22:59 -0400
                Re: El Capitan oddities Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-10 09:48 -0400
      Re: El Capitan oddities Tim Streater <timstreater@greenbee.net> - 2015-10-09 12:30 +0100

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