I have my WHS 2011 setup to do the default twice-a-day Backups and these have been working as expected.
I recently went away for 6 weeks and during that time the Server was completely shut-down and powered-off.
I got back at the end of June and have had to do a Server Restore today for a problem with WSUS, which has not been working since I got home. The Restore went as expected, except that when it came to choose my Restore Date/Time, ALL of the Backups prior to my return home/Server switch on date (i.e. end of June), are missing.
The HDD that the Backups are on appears fine, it's not full, and the Restore from one of the Backups that are on it went fine.
Why/how would the Server delete all of the Backups made before it was shut-down for 6 weeks?