<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  Explain why it is necessary to regularly test backups. Context: Regularly testing backups is necessary to ensure that the backup data is reliable and can be successfully restored when needed. Answer: [/INST]Regular testing ensures that the backup data is reliable and can be successfully restored when needed.</s>