Debian Bug report logs - #259491
mdadm interacts badly with udev

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Robert McQueen <robot101@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: mdadm interacts badly with udev

Date: Thu, 15 Jul 2004 03:25:07 +0100

Package: mdadm
Version: 1.5.0-2
Severity: normal

I had some problems with mdadm on a new installation of sarge, mostly
related to using kernel 2.6 and udev, I think. The first problem was
that it didn't detect and autostart the raid array /dev/md1 which was
an LVM physical volume - I now see this may be #231823, but there may be
other problems. I had to manually list it in mdadm.conf as /.dev/md1
because when attempting to open /dev/md1 to perform ioctls to assemble
the array, it didn't yet exist.

The second problem is related, and boils down to the fact that mdadm
runs immediately before lvm2 in the rcS.d sequence. LVM was scanning for
volumes before /dev/md1 had been created by udev, so finding nothing. I
had to create a script to run between them that waits until /dev/md1
exists - which turns out to be ~6 seconds! There is perhaps a more
elegant method to do this - make the mdadm init script do this waiting
(while [ ! -e /dev/mdX ]...), or interact in a better way with udev.

Regards,
Rob

-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (990, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.6-alpha2
Locale: LANG=en_GB, LC_CTYPE=en_GB

Versions of packages mdadm depends on:
ii  debconf                     1.4.29       Debian configuration management sy
ii  libc6                       2.3.2.ds1-13 GNU C Library: Shared libraries an
ii  makedev                     2.3.1-70     Creates device files in /dev

-- debconf information:
* mdadm/autostart: true
  mdadm/mail_to: root
* mdadm/warning:
* mdadm/start_daemon: false

Message #10 received at 259491@bugs.debian.org (full text, mbox, reply):

From: Marco d'Itri <md@Linux.IT>

To: 259491@bugs.debian.org

Subject: this is not a mdadm bug

Date: Sat, 7 Aug 2004 19:10:06 +0200

This is an udev "feature" and it should not be worked around in every
other package.
(Please do not bother reassigning this bug to udev, there are others.)

-- 
ciao, |
Marco | [7463 svWAFv/OXUj4M]

Message #15 received at 259491@bugs.debian.org (full text, mbox, reply):

From: Fabio Massimo Di Nitto <fabbione@fabbione.net>

To: 259491@bugs.debian.org, control@bugs.debian.org

Date: Thu, 12 Aug 2004 18:09:06 +0200 (CEST)

tag 259491 + patch
stop

Hi,
	this patch fixes (or implements a little workaround) in mdrun to
take appropriate actions when udev is running on the system, creating the
appropriate raid devices.

http://we.give.back.to.debian.even.if.we.have.no-name-yet.com/patches/mdadm.259491.diff

Thanks
Fabio

-- 
<user> fajita: step one
<fajita> Whatever the problem, step one is always to look in the error log.
<user> fajita: step two
<fajita> When in danger or in doubt, step two is to scream and shout.

Message #22 received at 259491-close@bugs.debian.org (full text, mbox, reply):

From: Mario Joussen <joussen@debian.org>

To: 259491-close@bugs.debian.org

Subject: Bug#259491: fixed in mdadm 1.6.0-2

Date: Mon, 16 Aug 2004 17:32:06 -0400

Source: mdadm
Source-Version: 1.6.0-2

We believe that the bug you reported is fixed in the latest version of
mdadm, which is due to be installed in the Debian FTP archive:

mdadm-udeb_1.6.0-2_i386.udeb
  to pool/main/m/mdadm/mdadm-udeb_1.6.0-2_i386.udeb
mdadm_1.6.0-2.diff.gz
  to pool/main/m/mdadm/mdadm_1.6.0-2.diff.gz
mdadm_1.6.0-2.dsc
  to pool/main/m/mdadm/mdadm_1.6.0-2.dsc
mdadm_1.6.0-2_i386.deb
  to pool/main/m/mdadm/mdadm_1.6.0-2_i386.deb



A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 259491@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Mario Joussen <joussen@debian.org> (supplier of updated mdadm package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Format: 1.7
Date: Mon, 16 Aug 2004 22:10:59 +0200
Source: mdadm
Binary: mdadm mdadm-udeb
Architecture: source i386
Version: 1.6.0-2
Distribution: unstable
Urgency: low
Maintainer: Mario Joussen <joussen@debian.org>
Changed-By: Mario Joussen <joussen@debian.org>
Description: 
 mdadm      - Manage MD devices aka Linux Software Raid
 mdadm-udeb - Manage MD devices aka Linux Software Raid (udeb)
Closes: 254922 259491 264059 264220 265480
Changes: 
 mdadm (1.6.0-2) unstable; urgency=low
 .
   * Included version 0.97 of "Debian Software Root Raid Documentation".
   * Now mdrun is only used if no mdadm.conf is present.
     Thanks to Thomas Prokosch <7nrmi1s02@sneakemail.com>.
     (closes: Bug#264059)
   * Added man page for mdrun.
     Thanks to Robert Collins <robertc@robertcollins.net>.
     (closes: Bug#265480)
   * Moved /etc/mdadm/debian.conf to /etc/default/mdadm.
     (closes: Bug#254922)
   * Added a little workaround to mdrun to interact better with udev.
     Thanks to Fabio Massimo Di Nitto <fabbione@fabbione.net>.
     (closes: Bug#259491)
   * Updated Brazilian Portuguese translation.
     Thanks to Andre Luis Lopes <andrelop@debian.org>.
     (closes: Bug#264220)
Files: 
 08de2b0ff2bc9906139198fa647c2343 610 admin optional mdadm_1.6.0-2.dsc
 04afdeeda218f1558d99b735fb3c7fcc 30283 admin optional mdadm_1.6.0-2.diff.gz
 90efe131acf0b6947e8bb15f037c7ecb 93774 admin optional mdadm_1.6.0-2_i386.deb
 4e48711a211a3aac13b06436c223b622 38372 debian-installer optional mdadm-udeb_1.6.0-2_i386.udeb
package-type: udeb

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