Relevant issues

• INFINIBOX-41973

Description

At this time all hot upgrades to 5.5.x are halted.

Systems running microcode 5.5.x are exposed - in rare circumstances - to a potential data loss during emergency shutdown:

• This could happen when the emergency shutdown takes place with other metadata protection operations simultaneously
• Starting with release 5.5.0 the exposure time for such multiple faults is greatly reduced 
• Therefore, the exposure for systems already running 5.5.x is minimal

There are two situations when this is still possible:

• If a node has a faulty enclosure drive failure (L3 already prevent upgrades if there is a faulty enclosure drive)
• During the first upgrade from 5.0.20-22 to a 5.5.x release there is a one-time metadata protection operation that might take time

Mitigation

The fix will be available in 5.5.30 and 6.0 when they release:

• Customers should wait for 5.5.30 release
• If a customer requires the functionality available in 5.5.12 and cannot wait for 5.5.30, then can be upgraded to 6.0 once it is released

New installs are approved to 5.5.12:

• They will require upgrade to 5.5.30 or 6.0 when they become available