This has bothered me over the years and I'm dealing with it again now. I've never quite understood the full black magic that is Shadow Copies/VSS. I get it to the extent of what it does and how to initially set it up and set the schedules on the volumes. I also understand its role in backups.
To simplify it, I'll stick with a single volume in my environment. I have the following schedules enabled:
1 - M-F 7am starting on 4/14/13 2 - M-F 12pm starting on 4/14/13 3 - 1st day of the month at 9am starting on 6/11/13
Use limit for that volume's shadow copies is
The volume is
250GB and has
44GB of free space.
Going backwards from today I show all the correct times/schedules for shadow copies back until 7/29/13. It doesn't go back further, and there isn't a 7/1/13 monthly copy.
I'm pretty sure I remember reading there is a 64 copy limit before the oldest gets overwritten. This makes sense since I count exactly 64 copies currently in the list.
- Is there a way to change this 64 copy limitation?
- Can I prevent monthly copies from being overwritten somehow and let it overwrite just the "dailies" instead?
- Does MS or others provide a way to manage shadow copies in a more granular fashion than the basic scheduling on the volume, etc. that I've already done above? ie. the ability to tell it "keep only the previous 4 weeks of this schedule" or similar.
My goal is to get to a point where i can have 12 "monthlies" and the previous month twice "dailies" (for a total roughly of 72 copies it would seem).
I have "real backups" using Commvault Simpana but it's so much easier to deal with a restore from shadow copies for simple file shares.