SSD Failure and Recovery

If a solid state drive (SSD) fails, the Oracle FS System uses RAID 5 (single parity) and the RAID 10 (mirroring), along with the dedicated spare drives, to recover lost data.

SSD arrays are configured with a dedicated spare drive. If the Oracle FS System detects a failing SSD, the system performs an Oracle Pre-emptive Copy, which copies the data from the failing SSD to the spare drive. An Oracle Pre-emptive Copy protects the system from performance degradation and potential data loss when an SSD fails. A spare drive can have different performance or data retention characteristics.

After the failing SSD is replaced, the system performs a copyback operation. The copyback operation copies the data from the spare drive to the replacement SSD. The copyback operation restores the SSD array to its original capabilitieswith a normal rebuild to spare and copyback from spare.

Note: You can view the remaining life expectancy (in months) and pro-actively replace the drive using Guided Maintenance in Oracle FS System Manager (GUI).