Re: How to initialize "composite" RAID

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Dear Mike Hartman,

In message <AANLkTim9TnyTGMWnRr65SrmJDrLN=Maua_QnVLLDerwS@xxxxxxxxxxxxxx> you wrote:
> This is unrelated to my other RAID thread, but I discovered this issue
> when I was forced to hard restart due to the other one.
> 
> My main raid (md0) is a RAID 5 composite that looks like this:
> 
> - partition on hard drive A (1.5TB)
> - partition on hard drive B (1.5TB)
> - partition on hard drive C (1.5TB)
> - partition on RAID 1 (md1) (1.5TB)

I guess this is a typo and you mean RAID 0 ?

> md1 is a RAID 0 used to combine two 750GB drives I already had so that

...as used here?

> Detecting md0. Can't start md0 because it's missing a component (md1)
> and thus wouldn't be in a clean state.
> Detecting md1. md1 started.
> Then I use mdadm to stop md0 and restart it (mdadm --assemble md0),
> which works fine at that point because md1 is up.

Did you try changing your configurations uch that md0 is the RAID 0
and md1 is the RAID 5 array?

Best regards,

Wolfgang Denk

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