From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christophe Varoqui <christophe.varoqui@free.fr>
Subject: Re: path checker open() flags, devmapper ioctl()
Date: Fri, 18 Apr 2008 21:43:01 +0200
Message-ID: <1208547781.11770.117.camel@plop>
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Here is an update with my findings of today.

Paths to R2 LU are flaged read-only upon detection, as can be seen with
"hdparm -r". hdparm is able to flag them rw (hdparm -r0). Once paths are
switched to rw, I still can't use multipath to load maps upon them.

But, issuing "blockdev --rereadpt" on the paths finally resolves this
issue.

I'm confused. What is expected from the multipath tools there ? I'd like
to have the multipath maps up and running for R2 LU, for them to be
ready the moment they get activated by the R1/R2 split. But I'm not sure
how to do that in the described context. Input welcome.

Regards,
cvaroqui