On Apr 8, 2009, at 12:42 PM, aussieshepsrock wrote:
>

>  I've never ever touched, seen, or used Timemachine before, but have
> a year or two of trust and experience with SuperDuper. Should I stick
> with that or give TimeMachine the job? Can it use a drive physically
> smaller than the internal drive in his G4? His drive has less than
> 40gig used and I know SuperDuper is OK with smaller drives holding the
> dupe of the original, but larger drive.

Time Machine is really designed for people who don't already have a  
secure backup strategy in place. It will work fine with a backup drive  
smaller than his built-in, but be aware it is an incremental backup,  
and keeps older versions of files as well...you're likely to run out  
of space
unless the Time machine volume is at least a couple-three times larger  
than his used space.

>   The backup is kept 'offline' completely unplugged from anything
> unless being updated or 'rescuing' a problem situation. Does this
> influence TimeMachine's usability?

Well, so far as backing up, no, but this kills the easy restore  
feature of TM pretty well . Time machine IS designed to be always on.

> I run SuperDuper on a manual basis
> on a fairly regular basis and my father backs up his snapshots from
> iphoto regularly on his own.

If what's working aint' broke, I wouldn't rush to fix it.

The best, gold-plated, strategy, imo is to use both.

One SuperDuper or Carbon Copy  Cloner volume (or volume set, for  
proper backup rotations), for offsite-able, bootable backups, and an  
always-on, always-connected TM volume for those "Oh crap I didn't mean  
to <make irrevokable change to a file or folder>" moments.

A Time machine volume will allow you to restore from a TM volume, even  
though you can't boot from one.

The drawbacks are it's not bootable, and maintaining a rotating backup  
(offsite and onsite) isn't nearly as easy. In theory, you should be  
able to to have two Time Machine volumes with the same name, stop time  
machine, swap them, restart time machine and have it go on, but I  
haven't tried that yet.

The drawbacks with SuperDuper/CCC are that (unless you set them up  
this way) they're not automatic, and maintaining the kind of 'going  
back in time' stuff that Time Machine lets you do is much more  
difficult.

Frankly I've used my Time Machine backups in both fashions...to  
completely restore (about 1% of the time, or rather, *once*) and to  
retrieve earlier/accidentally changed/accidentally erased versions of  
files (about 99% of the time).

In our larger systems practice here (in this case using our tape  
backups and Windows Server's Shadow Volume Copy) it's pretty much the  
same kind of ratio. Restoring a single file or group of files is 99%  
of our restore work, rather than rebuilding servers.

-- 
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs



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