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Repairing Disk permissions -- News (?!?)

Avatar Euan Williams
At last night's WaMug Bournemouth meeting (17th November 09) our guest speaker, Don Collier, said that Apple had recently told him (at a fairly senior level) that to Repair Permissions from the appropriate Apple Install DVD is an effective thing to do in difficult circumstances.

Received knowledge has generally been that Disk Utility should be run from your start-up disk when repairing permissions. This now appears not to be the case, and the DVD route offers a more robust result.

Don is a long-standing Filemaker developer.

Wunnerful events, WaMug meetings!

Enjoy...

Re: Repairing Disk permissions -- News (?!?)

Avatar Lionel Ogden
Just to add to Euan's information, this advice only applies to the Install DVD, A clone on an external Hard drive cannot be used to repair permissions on the main startup disc.

Re: Repairing Disk permissions -- News (?!?)

Avatar John Surtees
While not wishing to cast doubt on this subject. I'm having trouble understanding why the outcome of an action (repairing permissions), should be influenced by the source of the instruction.

No doubt there is a logical reason. Can anybody shed some light?

Re: Repairing Disk permissions -- News (?!?)

Avatar Euan Williams
Apparently the Apple DVD System Installer disc uses its Disk Utility in this special way...

It's a mystery wrapped in an enigma wrapped in deepest brightest Apple-ness (or something) but I would love to hear from an expert too!

Re: Repairing Disk permissions -- News (?!?)

Avatar Mark Ford
Somebody called?

Re: Repairing Disk permissions -- News (?!?)

Avatar Derek Wright
My understanding was that a Permission Repair on a booted drive would not be able to repair permissions of active files ie files associated with active applications and active parts of the running system.

If you have more than one bootable drive you can Repair permissions from Disk Utility of the non booted drives.
If this gives the same result as booting from the install DVD it may be faster as the DVD boot can take quite a while.

Re: Repairing Disk permissions -- News (?!?)

Avatar Derek Wright
Another thought perhaps the Disk Utility runs at a higher level than Admin when running from a booted Install DVD and can so get to parts that Admin run DU cannot get to. - a 2p thought

Re: Repairing Disk permissions -- News (?!?)

Avatar Derek Wright
I asked about this issue on the Apple discussion forums - see

http://discussions.apple.com/thread.jspa?threadID=2243961&tstart=0

and

http://support.apple.com/kb/HT1452

the view is that one should run DU from the active uptodate OSX drive (the Installation DVD being potentially down level after a fix pack has been issued.


Re: Repairing Disk permissions -- News (?!?)

Avatar Derek Wright
however the discussion continues
 
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