Re: raid1 with several old drives and a big new one

Roman Mamedov
2020-08-01T09:05:55Z

On Thu, 30 Jul 2020 20:57:38 -0600
Chris Murphy <lists@colorremedies.com> wrote:

> On Thu, Jul 30, 2020 at 6:16 PM Eric Wong <e@80x24.org> wrote:
> >
> > Say I have three ancient 2TB HDDs and one new 6TB HDD, is there
> > a way I can ensure one raid1 copy of the data stays on the new
> > 6TB HDD?
>
> Yes. Use mdadm --level=linear --raid-devices=2 to concatenate the two
> 2TB drives.

Or go with a RAID0 for this, to get a nice performance benefit as well. It is
a bad idea in any case to hope for any data recoverability from a half-failed
linear "array".

--
With respect,
Roman