Re: "not enough space" with "data raid0"

["Alex Plumbley-Jones" <alex@xxxxxxxxx>]

Hi Hugo, 

I did mention backups sir in my last sentence, but thank you anyway.  No harm in repeating the point. 



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-----Original Message-----
From: Hugo Mills <hugo@xxxxxxxxxxxxx>
Date: Mon, 19 Mar 2012 17:58:50 
To: Alex<alex@xxxxxxxxx>
Cc: <linux-btrfs@xxxxxxxxxxxxxxx>
Subject: Re: "not enough space" with "data raid0"

On Mon, Mar 19, 2012 at 03:14:19PM +0000, Alex wrote:
> 
> >    I'm working on a comprehensive explanation of the limits on btrfs's
> > space usage, and a little JavaScript tool to help plan/explain disk
> > usage.
> 
> Thank you Hugo.
> 
> Given the kernel 3.3 release yesterday [1] we've gained the ability to restripe
> to different raid levels after the fact. So I guess I don't have too much to
> worry about with decent backups.

   Yes, you do. RAID is not a backup: What happens if you accidentally
write zeroes over all your superblocks? Or rm -rf /home? RAID will not
help you here.

   Hugo.

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