[dm-devel] [mdadm PATCH] Create: tell udev md device is not ready when first created.

[Martin Wilck]

On Sat, 2017-05-06 at 15:50 -0400, Phil Turmel wrote:
> 
> I think a case can be made for wiping it all during create, for
> consistency with other kernel behaviour.  If you allocate memory for
> userspace, or or create a new file on a filesystem with a specific
> size,
> linux goes to some length to deliver zeros in both cases.  Arguably,
> it
> should do so in MD, too.
> 
> However, changing the default behaviour would fit Linus' definition
> of a
> regression, I would think.

+1 for the last paragraph.

Waiting for the day when a big corporate user creates an MD mirror from
a disk with invaluable data and expects the data to persist, but mdadm
just wipes it all ...

Martin

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