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Deleting a file or folder from ALL snapshots.
I have just moved most of my collection of photos from one folder to another on my PC, as part of my recent 'tidy' project. The PC is backed up regularly to the ReadyNAS system, which does snapshots ...
Certainly I confirmed this on the NAS today (see below).readysecure1985 wrote: Snapshots are read-only, not read-write. Therefore, once a snapshot is taken, it's read-only from that point on.
btrfs has a way to turn snapshots read-write, but doing so will not be supported by NETGEAR and is at your own risk.
http://unix.stackexchange.com/questions ... t-writable
What I find interesting is that you say that is what we should NOT be doing, and then show us how to do it :o.
I'm not a Linux expert, so would not be going down that route anyway.
It's nice to know that someone else might find the facility I am suggesting useful.btaroli wrote:
But on another Linux box, I find all my snapshots are by default read-write. Need to see if I can default that the other way. Given how these are created, they really shouldn't be modifiable. Though it might be handy if some were.
I double checked today and No the snapshots are NOT deletable from the PC, they only appear to be deleted.btaroli wrote: So, BaJohn, I suspect that whatever you are seeing is not coming from the NAS... perhaps something running on the PC is creating those folders you see?
When viewing on the PC, the properties are 'full access' to everyone and if you highlight and delete, it asks "do you want to permanently delete this file - Yes or No"?. When I click yes, the screen refreshes with the file shown as deleted from the snapshot folder. No other messages about it did not happen, or about needing authority or anything.
It seems to me that the PC (Windows 7 Ultimate 64bit) and the NAS (RN516) are NOT talking to each other in the same language, as the NAS knows I cannot delete the snapshot file, BUT the PC thinks it can.
Wierd ay, perhaps it's a case of "Can't see the wood for the B... Trees."
FWIW I have nightly snapshots scheduled, with backups from my PC to NAS every day or so. I also occasionally do manual snapshots, usually after a significant change to data. The nightly snapshots take care of themselves, and I have manually pruned these now and again. The intention is to retain some manual snapshots for a long while, probably more than 3 months (I will probably get less paranoid with time). I currently do not have a problem with space, being at about 10% (hmmm was nearer 15% a little while ago, but I do housekeeping, and defrag, balance etc)
StephenB wrote: fwiw, what I am doing is using the automatic snapshot pruning, and then manually deleting snapshots older then 3 months about once a month. That gives me 3 months of previous versions, and (so far) a good amount of free space. With the automatic algorithm, this only requires deleting one or two monthly snapshots from each share.
Going back on subject, the photos that were moved from effectively from one virtual disk to another, consume space on the NAS unnecessarily in potentially ALL snapshots. Hence why I wanted to slice through the snapshots (without deleting them in their entirety), so that ALL trace of the photos in their old position was removed.
As I say, I have been deleting these from one snapshot at a time, by hand accessing the NAS from my PC. My belief was that this was okay and probably more efficient if I did the oldest first and worked towards the present day. BUT it would have been nice to have an option on the NAS to delete all associated files in all snapshots.
I needed to ask to discover if it was possible or not. 'mdgm' might have replied "Great idea BaJohn, we will implement in the next version" :) .
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