Thanks for the excellent TM info! This gives me a lot of hope. I'll proceed to requisition the drive out of storage and hope for the best!
-Carl > On Sep 12, 2019, at 12:13 PM, Michael <keybou...@gmail.com> wrote: > > > On 2019-09-12, at 11:14 AM, Carl Hoefs <newsli...@autonomy.caltech.edu> wrote: > >> Yes, I was hoping to get the data off the drive. I was unsure how TM drives >> work when apart from the system they were backing up. If I connect the TM >> HDD to another system, does TM know the backups on it aren't for that >> system? Would the TM backup data be available through TM on the new system? >> Or would I need to cd into the drive and copy files off manually? > > There's some variations over time, but basically the backup directory > contains a top-level "per machine" section, that is used to identify if the > backup is for a given machine or not. When you use (I think) associateDisk to > take ownership of a backup disk for a new machine (typically used when you > restore a backup onto a new machine if the old mother board dies, etc), that > just renames that directory to indicate current ownership. > > The files on the backup basically are untouched. They are placed in > directories that do not permit any write operations of any kind (ACL lists). > All files/directories get two extended attributes to indicate that they are > in a backup and the approximate range of which backups. If there were any > special permissions, those should be indicated in another special extended > attribute. > > Modern Finder should, on copy, restore the permissions/ACL's of the files to > normal when they come out of the backup directory. Older systems only did > that when you restored through the time machine interface or the tmutil > command. > > Normal file system commands will work just fine. The TM directories just look > like normal read-only directories containing the files. If you are not using > any special ACL's or extended attributes, everything will treat them > normally, including normal "chmod" permissions and ownerships > > You might need to use "Browse other time machine disks" if you wanted to look > at it through the TM graphical interface. > > --- > Entertaining minecraft videos > http://YouTube.com/keybounce > _______________________________________________ MacOSX-talk mailing list MacOSX-talk@omnigroup.com http://www.omnigroup.com/mailman/listinfo/macosx-talk
