Storage apparatus and failure recovery method

Proposed are a storage apparatus and a failure recovery method capable of performing failure recovery processing while reducing performance deterioration. Whether user data is written into a storage area provided by multiple storage mediums is managed for each stripe. When any one of the storage mediums is blocked due to a failure, correction copy processing is executed to the stripe written with the user data in preference to the stripe not written with the user data in a storage area provided by the multiple storage mediums, and correction copy processing is executed to the stripe not written with the user data in a storage area provided by the multiple storage mediums during spare time.