From mboxrd@z Thu Jan  1 00:00:00 1970
From: Robin Hill <robin@robinhill.me.uk>
Subject: Re: mdadm 3.1.1  fails to hot remove device - No such device or
 address
Date: Fri, 26 Feb 2010 14:42:20 +0000
Message-ID: <20100226144220.GA24333@cthulhu.home.robinhill.me.uk>
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On Fri Feb 26, 2010 at 08:37:51AM -0500, Foster_Brian@emc.com wrote:

> Hi Neil,
>=20
> We run mdadm in a NAS framework and recently updated to 3.1.1 after
> using older revs for quite some time. We recently observed an issue
> where we've been unable to hot remove a failed device from an array,
> where that member device has been physically removed from the system.
> 'mdadm /dev/md# -r /dev/sdg#' returns a "No such device or address
> error."
>=20
> It turns out this occurs due to the dev_open() call added in the code
> referenced below. The hot remove works as expected if we revert this
> change with the patch shown below. Was the dev_open() added for some
> functional reason I'm not aware of (i.e., are we now breaking some other
> error path by doing this)? For future reference, is there a better way
> to handle the situation where the member device is physically gone? Note
> that we currently have a static set of devnodes; no udev or anything
> like that. Thanks.
>=20
Does "-r failed" or "-r detached" not work?  That should be the easiest
way to remove failed/detached drives from the array.

Cheers,
    Robin
--=20
     ___       =20
    ( ' }     |       Robin Hill        <robin@robinhill.me.uk> |
   / / )      | Little Jim says ....                            |
  // !!       |      "He fallen in de water !!"                 |

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