lun paths managed by DMMP need to be manually rescanned during IBM SVC firmware upgrade

Solution Verified - Updated -

Issue

  • we have 4 paths for every SVC luns . When SVC starts upgrading, one of 2 SVC nodes went offline so that all luns would lose half of paths , then after this node finished its upgrade , the paths we lost would return online automatically. Then IO can failback to these returned paths , the other SVC node could go offline for upgrade safely.
  • In previous version of RHEL, e.g. RHEL6, RHEL7.0 paths managed by DMMP returns automatically so that SVC upgrade can proceed without intervention.
  • In RHEL7.1 , I found the lost paths didn't return to be managed by DMMP unless we issue a rescan command.

Environment

  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

Log in for full access

Log In
Close

Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.