An issue has been identified that can cause a loss of access to data during a software upgrade if the system is using quorum disks from an XIV Storage Subsystem. This issue affects SAN Volume Controller or Storwize V7000 systems when upgrading from V5.1, V6.1, V6.2 or V6.3 to V6.4. This issue also affects Storwize V7000 Unified systems upgrading from V1.3 to V1.4.
When any of the three quorum disks for an SVC or Storwize system are configured to use an XIV managed disk, the upgrade may experience problems including a loss of access to data.
The software upgrade test utility version 10.13 or higher can be used to identify whether the upgrade is exposed to this issue.
Customers wishing to upgrade to V6.4 with an XIV Storage Subsystem must ensure that all quorum disks are configured on drives or managed disks which are not presented from an XIV system before starting the upgrade. Once the upgrade has completed, the quorum disks can be reassigned back to the XIV system.
The chquorum command line can be used to move the quorum disks to another managed disk or onto a Storwize V7000 drive. Full details of the command line can be found in the information center.
This problem was resolved in V18.104.22.168 and will be resolved in a future V6.4.1 PTF.
|Disk Storage Systems||IBM Storwize V7000 (2076)||6.4||IBM Storwize V7000||6.1, 6.2, 6.3, 6.4|
|Disk Storage Systems||IBM Storwize V7000 Unified (2073)||1.4||IBM Storwize V7000||1.3, 1.4|