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  #1  
Old 09-03-2009, 06:49 AM
xslord xslord is offline
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Please advise on the best backup

Hi i am new to SD (as i am evaluating it) at this moment it looks very promising!

Below is what i am using for the evaluation:


MacBook Pro 15" Unibody (APR'09):
With 2 partitions, one for the OS (Snow Leopard) and one for DATA



Freecom USB 2.5" 250GB External Harddrive
With 3 partitions, one with a copy of the SL Installer DVD, one OSX (10.5.8) Boot partition (with SuperDuper installed), and one for Data.



Question:
Can i create a backup (read only image) of Snow Leopard boot up partition on the MacBook Pro, when i bootup from my external USB HD.

Or should i boot from my MacBook (SL), install and run SuperDuper from there and do the backup?

Thanx for your advise

Last edited by xslord; 09-03-2009 at 06:52 AM.
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  #2  
Old 09-03-2009, 10:23 AM
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dnanian dnanian is offline
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You should not copy Snow Leopard from Leopard, no. And I would suggest a read/write image, not a read-only one (which is slow and can fail during conversion if any I/O errors or disk space issues occur).
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  #3  
Old 09-03-2009, 11:03 AM
xslord xslord is offline
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Quote:
Originally Posted by dnanian View Post
You should not copy Snow Leopard from Leopard, no. And I would suggest a read/write image, not a read-only one (which is slow and can fail during conversion if any I/O errors or disk space issues occur).
So if i understood it correctly i should create a backup of SL by booting and runing SD from another OSX startup (like from an external boot drive or another boot partition)?
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Old 09-03-2009, 11:49 AM
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dnanian dnanian is offline
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No, it's fine to copy the drive you're running from... but if you want to start up from an external HD, you should be running Snow Leopard to copy Snow Leopard.
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  #5  
Old 09-04-2009, 07:02 AM
xslord xslord is offline
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Hi dnanian

Thanx for your reply, could you be so kind and explain why it is better to create an SL image from an external startup which is also SL?

Cheers
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  #6  
Old 09-04-2009, 09:06 AM
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dnanian dnanian is offline
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You're going to get a more accurate copy if the drive isn't in use, since its files won't/can't change. However, in the vast majority of cases, those changes have no real effect.
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Old 09-04-2009, 01:01 PM
xslord xslord is offline
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Thanx again for your reply Dave,

But what i meant was : does it make any difference if i boot from an external drive (USB HHD with Leopard 10.5.8) and then make an image/backup of my MacBook (Snow Leopard)?
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Old 09-04-2009, 01:02 PM
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Yes. I can only say that so many times. Do not copy Snow Leopard from Leopard.
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  #9  
Old 09-04-2009, 04:05 PM
xslord xslord is offline
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Once again thanx for replying, but please forgive me if i asked it once more:

Why can't one not make an image from Snow Leopard by running SD from a Leopard Startup, please explain.

I know you mentioned this on a previous reply:
Quote:
You should not copy Snow Leopard from Leopard, no....
But i really would like to get some more (technical) details, to understand the reason (and to be able to explain it to others)

Thanx for your effort!

Last edited by xslord; 09-04-2009 at 04:07 PM.
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  #10  
Old 09-04-2009, 05:09 PM
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Because there are new features in the new OS, including compressed files, that aren't supported fully by earlier versions.
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