Bug ID 19587107
Issue: Performance of a virtual disk that uses parity for data reconstruction (RAID 5 and RAID 6) will be degraded during rebuild operations, for example, copying data to a hot spare. This performance loss is most notable on virtual disks with very high workloads.
Affected hardware: Oracle Storage 12 Gb/s SAS PCIe RAID HBA, Internal (models 7110116 and 7110117)
Workaround: There is no workaround. This is expected behavior of RAID volumes.