Re: problem with device validation

"Also sprach denis bonnenfant:"
> I have a problem with nbd device validation before adding it to fr1 array :
> 
> to be assembled, nbd device has to be validated. But i haven't found a reliable 

I'm not sure I know what you mean by "validated".

If you mean the flag in the nbdinfo status line ...

> Device a:       Open
> [a] State:      verify, rw, enabled, validated, show_errs, last error 0, lives 

Then that's the ENBD_VALIDATED flag

     atomic_read (&lo->flags)
           & ENBD_VALIDATED ? "validated, " : "",

which is set after a partition check has been done on the device, which
is to say that sector zero has been read and parsed by the kernel.

If you have no reason to check for partitions, you can disable the
check. It's a nuisance anyway, since there's a race in doing it - the
kernel needs the partition layout to authorise accesses to minors,
but we are talking through the minors via the daemons ... for that
reason the damons fall back to talking through the whole disk device 
using special auth codes if they can't talk through the minor devices.

You can disable the check by unsetting the ENBD_CHECK_PARTITIONS flag.

That's the "check_partitions" flag in the status line. I see you don't
have it set anyway, hence no partition check will be done. So I don't
think the validated flag means anything.

Why are you interested in it?

Peter