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SC Storage Customer Notification: Windows Hosts May Lose Access To Volumes That Were Live Migrated Between Systems on Storage Center OS 7.3 or Newer

Summary: Workaround for Windows Hosts May Lose Access To Volumes That Were Live Migrated Between Systems on Storage Center OS 7.3 or Newer

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Symptoms

Windows hosts may lose access to volume(s) that utilized the Live Migrate feature to move from a Storage Center to another Storage Center, both on Storage Center OS (SCOS) 7.3 or newer. Volume access will not be affected during and immediately following completion of Live Migrate, but Windows host may lose access to these volume(s) following a server reboot or other maintenance related tasks. This has only been seen on Windows hosts to date, and other Operating Systems should not be impacted. Additionally, this does not impact systems utilizing Live Volume or if one of the systems was on SCOS 7.2 or older when Live Migrate was used.

Until this issue is resolved, it is the recommendation of Dell EMC that the Live Migrate feature is not utilized if other options for data migration are possible. If no other options are available, the following workarounds can be applied.

Workaround/Mitigation Options:

Option 1: Does not require support intervention but does require a planned outage of impacted volume(s)

  1. Complete the Live Migrate process, follow the wizard in Dell Storage Manager (DSM) to rescan on the server when it is prompted.
  2. From the host(s) stop all IO to the volume.
  3. From the host(s) unmount the original Live Migrated volume.
  4. On Storage Center (DSM or Unisphere):
    • Unmap the Live Migrated volume from all hosts.
    • Take a snapshot of the Live Migrated volume.
    • Create a view volume from this snapshot.
    • Map the new view volume to the hosts.
  5. On hosts mount the new view volume and resume operations.
  6. Reboot server or complete planned maintenance.
  7. Delete the original Live Migrated volume from DSM or Unisphere.
  8. Repeat for other Live Migrated volumes if needed.


Option 2: Support resolution via Secure Console or serial access to the system
Support has a process to resolve this issue before host reboots or maintenance where this issue would occur, or after if it has already occurred. Support will need access to the system the volume(s) were migrated to via Secure Console or serial. Once resolved volume access is restored via a disk rescan on the host or a reboot of the host.
 

Details support will require:
  1. Name of the volume(s) Live Migrated
  2. Serial Number or ServiceTag of the system you Live Migrated from and you Live Migrated to
  3. Access to the system you Live Migrated to via Secure Console or serial

Cause

.

Resolution

This will be resolved in an upcoming version of Storage Center OS. Please contact support if you have any questions.

Affected Products

Dell Compellent SC4020, Dell Storage SC8000, Dell Storage SC5020, Dell Storage SC5020F, Dell Storage SC7020, Dell Storage SC7020F, Dell Storage SC9000, Dell Storage SCv3000, Dell Storage SCv3020