Re: Fwd: problems attempting to grow raid5 to raid6 - advice sought

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On Fri, Nov 24, 2017 at 06:54:43PM -0800, Paul Chambers wrote:
> (all the detailed info is at the end of this email)
> 
> I could use some expert help...
> 
> I started with a RAID-5 array of 5 x 6TB WD RED drives, and 1 x 6TB
> Seagate Ironwolf drive. This has been running well for a long time as
> a 5-drive array, and was grown to a 6 drive array a few months ago by
> the addition of the ironwolf drive. No known issues.
> 
>   ### devices in order: 0   1   2   3   4   5
>   DRIVES="sdj sdg sdf sdq sdc sdh"
> 
> I purchased 3 x 8TB WD Red drives, and used parted to set them up as
> GPT, with a single partition that fills the drive.
> 
> I then added them to the array in the usual fashion:
> 
> ~# mdadm --add /dev/md0 /dev/sdi /dev/sdk /dev/sdl
>

Hmm.. what was the point of creating the partitions if you added the whole disk to the array anyway? 


-- Pasi

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