When Is It Safe to Replace a Faulty Flash Disk?

When the server software detects a predictive or peer failure in a flash disk used for write back flash cache, and only one FDOM is bad, then the server software resilvers the data on the bad FDOM, and flushes the data on the other three FDOMs. If there are valid grid disks, then the server software initiates an Oracle ASM rebalance of the disks. You cannot replace the bad disk until the tasks are completed and an alert indicates that the disk is ready.

An alert is sent when the Oracle ASM disks are dropped, and you can safely replace the flash disk. If the flash disk is used for write-back flash cache, then wait until none of the grid disks are cached by the flash disk.