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Redhat : Updated mdadm package fixes md device issues
Red Hat Network has determined that the following advisory is applicable to
one or more of the systems you have registered:
Complete information about this errata can be found at the following location:
https://rhn.redhat.com/network/errata/errata_details.pxt?eid=2307
Bug Fix Advisory - RHBA-2004:226-14
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Summary:
Updated mdadm package fixes md device issues
An updated mdadm package that fixes a few bugs is now available.
Description:
The mdadm package is used to create, control, and monitor linux md software
RAID arrays.
This updated package includes the following fixes:
-- Building of the mdadm RPM would fail on a system without the groff RPM.
The output of nroff, part of groff, was not installed or included in the
final mdadm RPM. Resolution: The RPM build process was changed so it no
longer would invoke the nroff application.
-- The mdadm RPM includes the mdmpd daemon. However, there was no
documentation included for the mdmpd program. Resolution: A man page for
the mdmpd daemon that describes its operation and usage was added.
-- The mdadm program is used to monitor active md RAID arrays and
notifies the system administrator in the event of an error. When scanning
for arrays that should be monitored, the mdadm program opens a file
descriptor to each array. Due to a bug in the mdadm program, the file
descriptor failed to close each array after loading the array
configuration. The linux kernel will not allow a software RAID array to be
stopped by the system administrator so long as the array device file is
held open by any programs. Since the mdadm program always held the
array device file open, a system administrator would be unable to stop any
md RAID devices. The mdmonitor service needs to be stopped first for the
mdadm program to safely stop the device. Resolution: A bug was found in the
mdadm program. The addition of an fclose() on the array file descriptor
fixed mdadm file descriptors on monitored md RAID devices.
-- The mdmpd daemon is used to monitor multipath devices. On startup, the
mdmpd daemon did not properly close the standard input and output file
descriptors and detach from the controlling terminal. This could cause
other programs that wait for mdmpd to close it's output file descriptor to
hang. A call to the daemonize() function was added to the mdmpd startup
sequence so that all file handles would be properly closed and the mdmpd
daemon would properly detach from the controlling terminal.
All users of mdam should upgrade to this updated package, which
resolves these issues.
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Taking Action
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You may address the issues outlined in this advisory in two ways:
- select your server name by clicking on its name from the list
available at the following location, and then schedule an
errata update for it:
https://rhn.redhat.com/network/systemlist/system_list.pxt
- run the Update Agent on each affected server.
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Changing Notification Preferences
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To enable/disable your Errata Alert preferences globally please log in to RHN
and navigate from "Your RHN" / "Your Account" to the "Preferences" tab.
URL: https://rhn.redhat.com/network/my_account/my_prefs.pxt
You can also enable/disable notification on a per system basis by selecting an
individual system from the "Systems List". From the individual system view
click the "Details" tab.
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Affected Systems List
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This Errata Advisory may apply to the systems listed below. If you know that
this errata does not apply to a system listed, it might be possible that the
package profile for that server is out of date. In that case you should run
'up2date -p' as root on the system in question to refresh your software profile.
There are 19 affected systems registered in 'Your RHN' (only systems for
which you have explicitly enabled Errata Alerts are shown).
Release Arch Profile Name
-------- -------- ------------
3AS i686 durian.nac.uci.edu
3AS i686 br.nac.uci.edu
3WS x86_64 m33.ps.uci.edu
3WS i686 montana.nac.uci.edu
3AS i686 hydra.nac.uci.edu
3AS i686 p02.es.uci.edu
3AS x86_64 mpc64.nacs.uci.edu
3AS i686 mothra.nac.uci.edu
3AS x86_64 narg.nac.uci.edu
3AS i686 nebraska.nac.uci.edu
3AS i686 vesta.nac.uci.edu
3AS i686 bounce2.nac.uci.edu
3AS i686 cpl-console.nac.uci.edu
3AS x86_64 pxe.es.uci.edu
3WS i686 node-xeon-4
3WS i686 node-xeon-10
3AS x86_64 iwt01.nac.uci.edu
3AS x86_64 iwt03.nac.uci.edu
3AS x86_64 iwt02.nac.uci.edu
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