Time Machine + ReadyNAS Duo: Only TODAY'S backups are kept.

Hello,

I don't know if you need an answer 4 and a half months after but i've got one for you.

The trouble is that for magical reasons Mac OS Lion is able to write backup on the NAS but not to read them (It's magic I said :D ).
To fix the problem, you need to change read/write access on the backup directory on ReadyNas Time Machine disk.

Here's a solution :
1) Click on the little clock at the top of the screen then "Enter Time Machine"
2) Let the infinite space appears, the list of your backup is limited to a couple of hours ago (because they are just local backups, the ones on your MacBooks hard disk, a new Time Machine functionality, but backups located on the NAS are at this step unreachable so you cannot see them). Just for information local backups appears in white on the right "time bar" and backups on NAS appears in purple (when they appear and that is not the case yet if you're at this step of my solution :D )
3) Go back to the desktop and open a Finder
4) A new disk must appear at the bottom of the left menu, under your computer name



It's named "Copie de sauvegarde" in french but I think it may be "Backup copy" or "Backup disk" in english ...

5) Open it. It contains only one directory named "Backups.backupdb"



Open it, you will find one or more directory named as your computer(s) name(s)

6) Right click on the directory named as your MacBook then choose "Read information". What you have to do is give Read and Write access on this directory to user called "staff".



You will certainly need to click on the little padlock at the bottom and enter your computer password to unlock this functionality.

7) Close information window. Enter in Time Machine and let the space and time magic happens 8)
(the Magic sometimes take 10 or 20 seconds to happen ...)

I hope that will help you ! (or at least one person on the Internet :D )