我今天醒来发现我的CentOS服务器的文件系统已经设置为只读模式。 我正在这台服务器上运行RAID 1。
# mkdir test mkdir: cannot create directory `test': Read-only file system 我做了一些研究，发现这通常是由硬件问题引起的，即硬盘即将失效。
我如何确定这是硬件问题而不是软件问题？
如果是硬件问题：如何找出两个驱动器中哪一个发生故障，需要更换？ Smartctl为两个驱动器显示“PASSED”，尽pipe显示了678个重新分配的扇区，另一个显示了33个重新分配的扇区。 （我再次使用RAID 1）
dmesg输出
ata2.00: exception Emask 0x0 SAct 0x4000000 SErr 0x0 action 0x0 ata2.00: irq_stat 0x40000008 ata2.00: failed command: READ FPDMA QUEUED ata2.00: cmd 60/08:d0:58:11:38/00:00:01:00:00/40 tag 26 ncq 4096 in res 51/40:02:5e:11:38/00:00:01:00:00/40 Emask 0x409 (media error) <F> ata2.00: status: { DRDY ERR } ata2.00: error: { UNC } ata2.00: configured for UDMA/133 sd 1:0:0:0: [sdb] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE sd 1:0:0:0: [sdb] Sense Key : Medium Error [current] [descriptor] Descriptor sense data with sense descriptors (in hex): 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00 01 38 11 5e sd 1:0:0:0: [sdb] Add. Sense: Unrecovered read error - auto reallocate failed sd 1:0:0:0: [sdb] CDB: Read(16): 88 00 00 00 00 00 01 38 11 58 00 00 00 08 00 00 end_request: I/O error, dev sdb, sector 20451678 EXT3-fs error (device md2): ext3_get_inode_loc: unable to read inode block - inode=637820, block=2555947 ata2: EH complete Aborting journal on device md2. EXT3-fs (md2): error: ext3_journal_start_sb: Detected aborted journal EXT3-fs (md2): error: remounting filesystem read-only EXT3-fs (md2): error: remounting filesystem read-only __journal_remove_journal_head: freeing b_committed_data __journal_remove_journal_head: freeing b_frozen_data __journal_remove_journal_head: freeing b_committed_data ata2.00: exception Emask 0x0 SAct 0x1000006 SErr 0x0 action 0x0 ata2.00: irq_stat 0x40000008 ata2.00: failed command: READ FPDMA QUEUED ata2.00: cmd 60/08:c0:58:11:38/00:00:01:00:00/40 tag 24 ncq 4096 in res 51/40:02:5e:11:38/00:00:01:00:00/40 Emask 0x409 (media error) <F> ata2.00: status: { DRDY ERR } ata2.00: error: { UNC } ata2.00: configured for UDMA/133 sd 1:0:0:0: [sdb] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE sd 1:0:0:0: [sdb] Sense Key : Medium Error [current] [descriptor] Descriptor sense data with sense descriptors (in hex): 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00 01 38 11 5e sd 1:0:0:0: [sdb] Add. Sense: Unrecovered read error - auto reallocate failed sd 1:0:0:0: [sdb] CDB: Read(16): 88 00 00 00 00 00 01 38 11 58 00 00 00 08 00 00 end_request: I/O error, dev sdb, sector 20451678 EXT3-fs error (device md2): ext3_get_inode_loc: unable to read inode block - inode=637807, block=2555947 ata2: EH complete
您的磁盘sdb正在死亡并且Unrecovered read error - auto reallocate failed错误意味着没有可能重新分配坏块并且磁盘可能在任何时候死亡。 在我们的案例中，在dmesg有这样的错误的磁盘将在最近的将来死亡（一个或最多两个月）。 另外，如果您的磁盘在SMART中的Reallocated_Sector_Ct越来越多，这意味着您的磁盘处于预失败状态，您应该警告它的更换。