z/VSE recommendations: concurrent microcode upgrade
Ingolf24 120000DRN3 Visits (8693)
Just recently we had questions, if z/VSE supports concurrent microcode upgrade for devices. In general I recommend to shutdown the z/VSE system(s), 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.