Concurrent microcode upgrade with z/VSE
Ingolf24 120000DRN3 Visits (12635)
About 16 month ago I posted a blog entry about z/VSE recommendations for concurrent microcode upgrade for IBM System Storage. I just got again questions about that subject.
z/VSE does not fully support concurrent microcode upgrade during a z/VSE system is active. Therefore I strongly recommend to shutdown the z/VSE system(s) for disk storage microcode upgrades, do the upgrade and re-ipl the z/VSE system. I would not plan the upgrade, if dependent z/VSE systems are still active.
The following recommendations are on the z/VSE web page - here:
Concurrent microcode upgrade for IBM System Storage: Please consult your device documentation.
Recommendation for IBM Disk Storage:
Recommendation for IBM Tape Storage:
z/VSE with the latest service level supports concurrent microcode upgrade for IBM Tape Storage. z/VSE recommends to take the tape units offline (z/VSE OFFLINE command) prior to the microcode upgrade or use the next maintenance window. Once the upgrade completed, take the tape units online again (z/VSE ONLINE command). Please check with your software vendors (e.g. tape management systems), if they support concurrent microcode upgrade.