I assume you are looking for double redundancy--survive a double failure.
It would be more efficient to do raid5 on top of several raid1 arrays. You
will have more arrays, but the checksum will only be calculated once. If you
tried raid1 above raid5, you would be calculating the checksum twice (once
for each raid5)
I think the device structure will allow the layering. However, doing an
auto-start isn't possible. Try it out, let us know if and how it works.
<>< Lance.
> Hi.
> Is it possible to construct Raid1 on Top of 2 Raid5 arrays (all
> software raids) ?
>
>
> Thanks.
>
>
