Re: [BUG] non-metadata arrays cannot use more than 27 component devices

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On 03/01/2017 12:23 PM, Phil Turmel wrote:
> I strongly disagree.  This procedure, as shown, is an admin cock-up:
> 
>> mdadm --build /dev/mdbackup --device-count 2 /dev/md/home missing
>> ... hotplug sd-big ...
>> madam /dev/mdbackup --add /dev/sd-big
>> ... wait for sync to finish ...
>> mdadm --stop mdbackup
>> ... unplug sd-big ...

One more point.  The above is functionally identical in every respect
to just:

# dd if=/dev/md/home of=/dev/sd-big bs=1M

Why are you bothering to --build an array?

Phil

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