Re: RAID6 mdadm --grow bug?

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On Thursday September 13, millerdc@xxxxxxxxxxxxxx wrote:
> Neil,
> 
> On RHEL5 the kernel is 2.6.18-8.1.8. On Ubuntu 7.04 the kernel is  
> 2.6.20-16. Someone on the Arstechnica forums wrote they see the same  
> thing in Debian etch running kernel 2.6.18. Below is a messages log  
> from the RHEL5 system. I have only included the section for creating  
> the RAID6, adding a spare and trying to grow it. There is a one line  
> error when I do the "mdadm --grow" command. It is "md: couldn't  
> update array info. -22."

reshaping raid6 arrays was not supported until 2.6.21.  So you'll need
a newer kernel.

NeilBrown
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