Re: vol_id and RAID1 members

[md@Linux.IT (Marco d'Itri)]

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On Jan 27, Kay Sievers <kay.sievers@vrfy.org> wrote:

> > Yes. Indeed, vol_id gets EIO when trying to read the superblock.
> > 
> > I think that in this case it should report the error and exit, because
> > as I showed if the partition really is an array member then it will
> > report wrong information which if used will cause data loss.
> 
> But how can returning an error by reading the very end of the device
> be an indication for a raid device? If we can't find a raid signature,
What I meant is that failure to read the partition should be an
indication for broken devices.

> we should look for a filesystem. I've seen some devices, where the
> reported size is not fully readable and they would fail with such a logic,
> which would break other things.
These devices looks broken or at best misconfigured.
In which sane and normal scenario would a partition have sectors which
return EIO when read, but be otherwise fully functional?

-- 
ciao,
Marco

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