A RAID 5 with a failed disk will continue to work . If a database is expected to be strongly write-biased , RAID 5 becomes the more attractive option , since RAID 5 does not suffer from the same write handicap inherent in RAID 10 ; all spindles in a RAID 5 can be utilized to write simultaneously , whereas only half the members of a RAID 10 can be used . However , for reasons similar to what has eliminated the `` read penalty '' in RAID 5 , the reduced ability of a RAID 10 to handle sustained writes has been largely masked by improvements in controller cache efficiency and disk throughput .