* raid5 - adding journal to an existing device?
@ 2017-02-25 14:12 Tomasz Chmielewski
2017-03-02 18:39 ` Shaohua Li
0 siblings, 1 reply; 3+ messages in thread
From: Tomasz Chmielewski @ 2017-02-25 14:12 UTC (permalink / raw)
To: linux-raid
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
Tomasz Chmielewski
https://lxadm.com
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: raid5 - adding journal to an existing device?
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
0 siblings, 1 reply; 3+ messages in thread
From: Shaohua Li @ 2017-03-02 18:39 UTC (permalink / raw)
To: Tomasz Chmielewski; +Cc: linux-raid, songliubraving, jes.sorensen
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: raid5 - adding journal to an existing device?
2017-03-02 18:39 ` Shaohua Li
@ 2017-03-02 19:19 ` Song Liu
0 siblings, 0 replies; 3+ messages in thread
From: Song Liu @ 2017-03-02 19:19 UTC (permalink / raw)
To: Shaohua Li
Cc: Tomasz Chmielewski, linux-raid@vger.kernel.org,
jes.sorensen@gmail.com
> 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
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2017-03-02 19:19 UTC | newest]
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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
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