如备份带不能克复，用诊断光盘（Diagnostic CDROM）查验能否坏硬盘。
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诊断光盘
Diagnostic CD
以上为机器翻译结果，长、整句建议使用 人工翻译 。
发现光盘保存的资料完好无损，而传统法有一部分胶片失去诊断价值。
The images kept in the optical disks were found complete and perfect, while the images stored in some of the ct films were found to have lost their diagnostic value.
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