Hi Walter, Tina is correct. If the permissions in the Get Info window appear as custom, this indicates that ACLs are in effect. You can check this in the Terminal using the following commands:
cd /Volumes ls -le Access Control Lists provide more granular control of permissions than POSIX permissions. Clearing ACLs is one of Apple's suggested methods for file system troubleshooting. On Oct 7, 2010, at 6:20 PM, gifutiger wrote: > Greetings Tina, > > WOW removing all 'ACL's may not be the best thing to do, i.e. > ---------------------------------------------------- > Technically seen, an ACL is a list of individual rights which can be > attached to a file system object. The ACL can either be empty -in this > case, only the conventional POSIX permissions apply-, or it can > contain one or more objects called Access Control Entries (ACEs). An > Access Control Entry includes the following information: > > to which users does this entry apply (this can be an individual user > or a user group)? > does this entry allow or deny access? > which right in particular is allowed or denied, respectively? > how should this entry be inherited from a folder to the contents of > this folder? > ---------------------------------------------------- > > So what you've done is made all files and application available to all > users that can log into your platform. > > ---------------------------------------------------- Clearing ACLs will not make all files and applications available to all users that can log onto you platform. Clearing ACLs still leaves POSIX permissions in effect. > If you were unable to make changes in the "get info" window then you > were not logged in as the platform owner. > As the owner has all privileges. > > Or sometime you may not be able to make direct changes but need to > either add or delete one or more of those listed in the ownership > listing. If your log-in name isn't listed then you need to touch the + > button and add your name. If you are able to unlock the lock then you > should have privileges to add users. > > The important thing is to make the "Ownership" of the locked disks the > same as the disk that you are logged as that is your main access > point. > ACLs cannot be defined or altered in the Finder. Trying to change the permissions of files and folders with ACLs set will result in exactly what you experienced. To remove ACLs, you need to use the terminal. They can be removed on individual files or folders as well as recursively. Details can be found in Mac OS X Support Essentials: http://books.google.com/books?id=iAwgbkQeZYQC&pg=PA246&lpg=PA246&dq=apple.com:+clearing+acls&source=bl&ots=WoZb6hvb7p&sig=oK5vLbu4zbWCx4Uwtf_Z6sQ2DxM&hl=en&ei=UY-uTMnROIW6sQO7ktH9Aw&sa=X&oi=book_result&ct=result&resnum=5&ved=0CCYQ6AEwBA#v=onepage&q&f=false I believe you said the drives were at the Apple Store. I suspect they will clear ACLs on the external disks to resolve the issue. I will be curious to hear what they say. Jim > > Cheers > > Harry > San Jose, Ca > ø?ºº?ø,¸¸,ø?ºº?ø,¸¸,ø?ºº?ø,¸¸,ø?º?ø > > > On Oct 6, 9:16 am, "Tina K." <[email protected]> wrote: >> On 2010/10/06 07:49, Walter Sheluk wrote: >> >>> Both of my External FireWire Drives were powered on and their icon's >>> were on the desktop ( iMac/3.06GHz/Snow Leopard ) when i decided for >>> some unknown reason to eject ( Command + I ) both drives to do a apple >>> software update/installation. >> >> I just experienced something very similar only it wasn't my external >> drives who's permissions got munged but my user folders - Desktop, >> Documents, Downloads, Dropbox, etc… Strangely Get Info yielded either >> "You can read & write" or "You have custom permissions" but no way to >> change them in the get info window, and the ones that were allegedly >> read write permissions would not let me actually write anything to the >> folder. >> >> The custom permissions message was my tip off. I googled 'remove acl >> leopard' or something to that effect (ACL= access control list) and >> removed all acl's via Terminal. This corrected my permissions problem, >> but not until I had reboot. >> >> FWIW, YMMV, ad nauseam. >> >> Tina >> -- You received this message because you are a member of the iMac Group, a group for those using Apple iMacs and eMacs. The list FAQ is at http://lowendmac.com/imac/list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/imaclist
