Re: [zfs-discuss] Lost intermediate snapshot; incremental backup still possible?

[Jeff Bonwick]

I think so.  On your backup pool, roll back to the last snapshot that
was successfully received.  Then you should be able to send an incremental
between that one and the present.

Jeff

On Thu, Feb 07, 2008 at 08:38:38AM -0800, Ian wrote:
 I keep my system synchronized to a USB disk from time to time.  The script 
 works by sending incremental snapshots to a pool on the USB disk, then 
 deleting those snapshots from the source machine.
 
 A botched script ended up deleting a snapshot that was not successfully 
 received on the USB disk.  Now, I've lost the ability to send incrementally 
 since the intermediate snapshot is lost.  From what I gather, if I try to 
 send a full snapshot, it will require deleting and replacing the dataset on 
 the USB disk.  Is there any way around this?
  
  
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Re: [zfs-discuss] Lost intermediate snapshot; incremental backup still possible?

[Ross]

Do you still have any snapshots on the original disk?  If so, you might be able 
to rollback the filesystem on the USB disk to match the last available snapshot 
and then run an incremental again?

If you've no snapshots left at all, I can't imagine there's anything you can do 
other than a full send/receive.

Incidentally, why delete the snapshots?  Unless you change an awful lot of 
files they don't usually take up much space.
 
 
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