# Re: kernel refuses devices mdadm -E accepts

- From: Wesley W. Terpstra \<hidden\>
- Date: 2015-01-20 18:32:50 
- List: linux-raid
- Page: https://ratatoskr.run/linux-raid/2015/01/6628824
- Thread: https://ratatoskr.run/linux-raid/2015/01/6628811/t.md

```text
On Tue, Jan 20, 2015 at 7:28 PM, Phil Turmel [ref] wrote:
>> Kernel version 3.17.8 and mdadm version 3.3.2.
> There have been many bug fixes to mdadm since that kernel was retired.

Really? I will give that a shot.

> Show us the output of that if it doesn't work (it should resume your
> reshape).

I will try that.

It was totally stupid reshape, I was changing the "data-offset" to
align it. Really unnecessary, and really slow, so I feel like an idiot
for starting it.

>> Thanks for any help. If I lose this array, I am going to face a lot of grief...
> I shouldn't have to say this, but RAID is for availability, not for data
> security.  You still need a backup system for any important data.

Sure. The really vital (and small) stuff I have backed up elsewhere,
but the sheer volume of raw video my girlfriend records is not
economically feasible to backup beyond raid+btrfs snapshots.
```