Re: Why does Btrfs allow raid1 with mismatched drives? Also: How to look behind the curtain

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On Jan 5, 2012, at 11:39 , Martin Steigerwald wrote:
> "Allocating as many chunks as can fit across the drives" is also pretty 
> clear to me. So if BTRFS can´t allocate a new chunk on two devices, its 
> full. To me it seems obvious that BTRFS will not break the RAID-1 
> redundancy guarentee unless a drive fails.

So (assuming 1GB chunksize):

if i create a raid-1, btrfs with a 3GB and a 7GB device, it will show me ~10GB free space,
after saving a 1GB file, i will have 8GB left (-1GB on each device)
after saving another 1GB, i will have 6GB left (--- " ----)
after saving another 1GB, it's "suddenly" full?

Fabian--
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