Re: nube trying to backup my systems

[Duncan <1i5t5.duncan@cox.net>]

don fisher posted on Thu, 19 Mar 2015 18:49:32 -0700 as excerpted:

> Any thoughts on stability of the IDs across boots?

Btrfs subvolIDs are a property of the btrfs and thus stable across boots.

(They're actually the root-tree ID, with ID=5 the main root tree for the 
entire filesystem, various other low-digit IDs being the root trees for 
various sets of filesystem metadata like the chunk tree and the free-
space tree, and IDs above 256 being subvolumes, with snapshots being a 
particular type of subvolume and thus having IDs above 256 as well.  Were 
these numbers to randomly change, therefore, btrfs would be in a world of 
hurt as it couldn't find various critical root trees it needs to parse in 
ordered to function!  So rest assured, if those numbers start changing 
and it's not because you deliberately decided to put a different subvolume 
there and forgot to change your fstab, it's a serious bug in btrfs!)

-- 
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"Every nonfree program has a lord, a master --
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