我的 Ubuntu 13.10 系统在过去一天左右的时间里表现非常糟糕。查看内核日志，似乎小于 1 年的 3TB SATA 磁盘的特定扇区存在问题：
Nov 4 20:54:04 mediaserver kernel: [10893.039180] ata4.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Nov 4 20:54:04 mediaserver kernel: [10893.039187] ata4.01: BMDMA stat 0x65
Nov 4 20:54:04 mediaserver kernel: [10893.039193] ata4.01: failed command: READ DMA EXT
Nov 4 20:54:04 mediaserver kernel: [10893.039202] ata4.01: cmd 25/00:08:f8:3f:83/00:00:af:00:00/f0 tag 0 dma 4096 in
Nov 4 20:54:04 mediaserver kernel: [10893.039202] res 51/40:00:f8:3f:83/40:00:af:00:00/10 Emask 0x9 (media error)
Nov 4 20:54:04 mediaserver kernel: [10893.039207] ata4.01: …