Technical Advisory

Document Number: ######, Revision 1.0

Technical Advisory

Intel® Rapid Storage Technology enterprise for Linux OS

Problem Report —

August 2013

Description

Description: When rebuild of IMSM volume is started in OROM, rebuild does not proceed when in the

Linux* OS.

Issue: Problem with Intel® RSTe for Linux OS using mdadm version 3.2.6 and earlier.

There are two causes of this issue (details are described in the patches below):

 The mdmon daemon did not write any information about the resync operation in the volume’s

metadata and did not save volume's checkpoint during expanding the size of a RAID1 or

RAID5 volume

 OROM used a different mechanism of moving a RAID volume from a degraded state to a

recovery state than the mdadm utility

Corrective Action/Resolution

Two following patches are needed to fix this issue:

 http://git.neil.brown.name/git?p=mdadm.git;a=commit;h=7ce05701813496571e1f7f79c726a

a6e4868bd5f

 http://git.neil.brown.name/git?p=mdadm.git;a=commit;h=79b68f1b48b0967da999945e310a

ef628c9bca4c

Updated mdadm packages that fix two bugs are now available for Red Hat Enterprise Linux 6.4 on

RHN:

 http://rhn.redhat.com/errata/RHBA-2013-0861.html

Note: When updating mdadm package the initramfs has to be rebuilt (dracut -f) after having updated

mdadm:rpm -U mdadm-3.2.5-4.el6_4.1.x86_64.rpm; dracut -f

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Technical Advisory Intel® Rapid Storage Technology enterprise for Linux OS Problem Report — August 2013 Description Description: When rebuild of IMSM volume is started in OROM, rebuild does not proceed when in the Linux* OS. Issue: Problem with Intel® RSTe for Linux OS using mdadm version 3.2.6 and earlier.
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Technical Advisory: Intel® Rapid Storage Technology enterprise: Linux OS INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL PRODUCTS. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT.