Re: [PATCH v15 00/42] btrfs: zoned block device support

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On Thu, Feb 11, 2021 at 09:58:09AM +0000, Johannes Thumshirn wrote:
> On 10/02/2021 21:02, David Sterba wrote:
> >> This series implements superblock log writing. It uses two zones as a
> >> circular buffer to write updated superblocks. Once the first zone is filled
> >> up, start writing into the second zone. The first zone will be reset once
> >> both zones are filled. We can determine the postion of the latest
> >> superblock by reading the write pointer information from a device.
> > 
> > About that, in this patchset it's still leaving superblock at the fixed
> > zone number while we want it at a fixed location, spanning 2 zones
> > regardless of their size.
> 
> We'll always need 2 zones or otherwise we won't be powercut safe.

Yes we do, that hasn't changed.



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