If I understand how Time Machine works, I have to wonder if it secure for long term storage of critical backups. My 80 gig Powerbook filled up a 500 g G drive in 8 days and Time Machine started its delete and compression process.
Am I missing something?
It filled up a 500G drive in 8 days when all the drives you backup are only 80 G?
Something is wrong there.
I have 3 internal drives which have a total of about 200GB used. I'm backing up to a 500G drive, and I installed TM the day leopard came out....10/26/07. So far it has used up 220G on the 500G drive.
So something is not right in your install of TM.
As far as I can see:
- TM takes hourly snapshots for the last 24 hours
- The first hourly of the day is saved as a DAILY backup. Daily backups are kept for 31 days.
- Based on what day you started TM (my case it was a Friday), TM will take that day each week and save that backup, removing the rest....making what is a weekly backup.
- It saves these weekly backup until the drive is full.
- So basically each month listed in TM should have 4-5 backups (1 from each week)
So, basically, if you want to make sure something is truly backed up, you need to make sure it is included in the daily backup that becomes the weekly.
Confused yet? Yeah, seems Apple doesn't want to release the Tech details on this.
It really is a
set it and forget it backup solution (not brought to you by Ronco
😉).
-Kevin