Zone / Group : zone1-groupa

The reason for this impact is the maintenance of the physical storage running root disk of the Resource .
The Resource may not be able to read and write to root disk (about a few seconds , about a few times) .
As a result , the Resource may not be able to connect (about a few seconds, about a few times) .
Additionally, failover may occur if you have configured VRRP redundancy with other resources in other zones or other groups . (*1)

*1) However, similar maintenance has never caused a failover on the Security Device of Managed Firewall menu , Managed UTM menu and Managed WAF menu .

You can avoid this impact by switching the active device to a resource of other groups before this maintenance . (However, you need to create a Resource in other zones or other groups in advance .)