RAID 5/6

RAID 5/6

[Michael]

Hello,
Does anyone know when RAID 5/6 are planned to be included in the
Kernel? 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.
Regards,
Michael

Re: RAID 5/6

[Hugo Mills]

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

   Short answer: Not yet, probably soon.

> 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.

   Hugo.

-- 
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
  PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
  --- "There's more than one way to do it" is not a commandment. It ---  
                           is a dire warning.                            

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Re: RAID 5/6

[Andreas Philipp]

On 10/22/2012 06:05 PM, Hugo Mills wrote:
> On Mon, Oct 22, 2012 at 10:58:07AM -0500, Michael wrote:
>> 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
>
> Short answer: Not yet, probably soon.
>
>> 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

Re: RAID 5/6

[Michael]

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
<philipp.andreas@gmail.com> wrote:
>
> On 10/22/2012 06:05 PM, Hugo Mills wrote:
>> On Mon, Oct 22, 2012 at 10:58:07AM -0500, Michael wrote:
>>> 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
>>
>> Short answer: Not yet, probably soon.
>>
>>> 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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