Re: RAID 5/6

This is one of those features that I have been waiting for since I
signed up for the mailing list last year. What source tree is that
code contained in? I would like to start testing it out and helping
out with bug reports(I am only going to use it in a testing VM,
nothing important to work at all). Maybe if I help get it tested and
play around with it I will be familiar when it is really pushed out
and also I can help speed up the development process.
Starting with RAID 1 is an expensive choice for me, I have 8TB of
data(backed up to a friend) that I would have in this array. I was
hoping I could do a RAID 5 of 4 3TB disks and grow it to a RAID 6 of 6
disks in a few months when I need more storage.
Mike

On Mon, Oct 22, 2012 at 12:44 PM, Andreas Philipp
[off-list ref] wrote:

On 10/22/2012 06:05 PM, Hugo Mills wrote:

quoted

On Mon, Oct 22, 2012 at 10:58:07AM -0500, Michael wrote:

quoted

Does anyone know when RAID 5/6 are planned to be included in the
Kernel?

This is in the FAQ:

https://btrfs.wiki.kernel.org/index.php/FAQ#Can_I_use_RAID.5B56.5D_on_my_Btrfs_filesystem.3F

quoted

Short answer: Not yet, probably soon.

quoted

I am starting to buy parts for my next computer and would very
much like to use BTRFS because I want a FS that can grow and also
recover from undetected read errors - it will be large enough that
these are possible. I'm hoping that it will be available for use in
the coming months.

You can switch storage types on the fly, so you could at least
start with RAID-1, and then restripe to RAID-5 (or -6) when it's
stable enough for you. This assumes that you can manage to use RAID-1
in the first place and expand later.

If you can live without redundancy at the beginning, you could also
start with RAID-0, and then restripe to RAID-5.

Andreas

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