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From: Song Liu <songliubraving@fb.com>
To: Shaohua Li <shli@kernel.org>
Cc: Tomasz Chmielewski <mangoo@wpkg.org>,
	"linux-raid@vger.kernel.org" <linux-raid@vger.kernel.org>,
	"jes.sorensen@gmail.com" <jes.sorensen@gmail.com>
Subject: Re: raid5 - adding journal to an existing device?
Date: Thu, 2 Mar 2017 19:19:28 +0000	[thread overview]
Message-ID: <A965D0D0-10A2-4CFF-8901-A786B09DD38C@fb.com> (raw)
In-Reply-To: <20170302183925.xnvvybpui6ldssv6@kernel.org>


> On Mar 2, 2017, at 10:39 AM, Shaohua Li <shli@kernel.org> wrote:
> 
> On Sat, Feb 25, 2017 at 11:12:21PM +0900, Tomasz Chmielewski wrote:
>> mdadm manual specifies the following for create, build and grow modes:
>> 
>>       --write-journal
>>              Specify journal device for the RAID-4/5/6 array.
>> 
>> However:
>> 
>> # mdadm --grow /dev/md2 --write-journal /dev/sdc1
>> mdadm: :option --write-journal not valid in grow mode
>> 
>> 
>> Is it not yet supported, will never be supported, or am I simply trying to
>> use it in a  wrong way?
>> 
>> 
>> 
>> Tried the following versions:
>> 
>> # ./mdadm -V
>> mdadm - v3.4-115-ge22fe3a - 29th November 2016
>> 
>> # mdadm -V
>> mdadm - v3.4 - 28th January 2016
> 
> Cc: Song and Jes.
> 
> I think we support hotadd journal. Will let Song clarify.
> 
> Thanks,
> Shaohua

We have support for hotadd journal to an array with broken/missing journal. 
We haven't implement hotted journal to arrays with no journal ever. We do plan
to add the feature. 

Thanks,
Song

      reply	other threads:[~2017-03-02 19:19 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-25 14:12 raid5 - adding journal to an existing device? Tomasz Chmielewski
2017-03-02 18:39 ` Shaohua Li
2017-03-02 19:19   ` Song Liu [this message]

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