centos数据盘变成只读文件系统

yecodes

最近服务器上有块数据盘莫名的变成了只读文件系统
输入ll命令

1. ls: 无法访问zjbss: 输入/输出错误
   
2. ls: 无法访问xb6202: 输入/输出错误
   

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创建一个新的文件夹或者文件

1. mkdir: 无法创建目录"aaa": 只读文件系统

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使用mount命令查看

1. /dev/mapper/vg_yanghang-lv_home on /home type ext4 (rw)
   
2. none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
   
3. sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
   
4. /dev/sdb2 on /www/web type ext4 (rw)
   

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cat /proc/mounts

1. /dev/mapper/vg_yanghang-lv_home /home ext4 rw,relatime,barrier=1,data=ordered 0 0
   
2. none /proc/sys/fs/binfmt_misc binfmt_misc rw,relatime 0 0
   
3. sunrpc /var/lib/nfs/rpc_pipefs rpc_pipefs rw,relatime 0 0
   
4. /etc/auto.misc /misc autofs rw,relatime,fd=7,pgrp=1609,timeout=300,minproto=5,maxproto=5,indirect 0 0
   
5. -hosts /net autofs rw,relatime,fd=13,pgrp=1609,timeout=300,minproto=5,maxproto=5,indirect 0 0
   
6. /dev/sdb2 /www/web ext4 ro,relatime,barrier=1,data=ordered 0 0

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我直接umount后在挂着就提示

1. mount: you must specify the filesystem type

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每次遇到这情况都得重启之后再挂载才行，不过过一段时间又提示只读文件系统，不知道是什么原因造成的，
我想fsck修复一下这块数据盘，不知道有没有用？

cryboy2001

先对数据备份，再修复看看，如果只是这一块硬盘问题，建议换掉。

yecodes

刚刚查看了一下日志信息，有一段这样的错误信息

1. May  6 10:32:16 yanghang kernel: ata5.00: exception Emask 0x50 SAct 0x0 SErr 0x280900 action 0x6
   
2. May  6 10:32:16 yanghang kernel: ata5.00: BMDMA stat 0x26
   
3. May  6 10:32:16 yanghang kernel: ata5: SError: { UnrecovData HostInt 10B8B BadCRC }
   
4. May  6 10:32:16 yanghang kernel: ata5.00: failed command: READ DMA EXT
   
5. May  6 10:32:16 yanghang kernel: ata5.00: cmd 25/00:e8:2f:d5:da/00:00:35:00:00/e0 tag 0 dma 118784 in
   
6. May  6 10:32:16 yanghang kernel:         res 51/84:67:ae:d5:da/84:00:35:00:00/e0 Emask 0x70 (host bus error)
   
7. May  6 10:32:16 yanghang kernel: ata5.00: status: { DRDY ERR }
   
8. May  6 10:32:16 yanghang kernel: ata5.00: error: { ICRC ABRT }
   
9. May  6 10:32:16 yanghang kernel: ata5: hard resetting link
   
10. May  6 10:32:16 yanghang kernel: ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
    
11. May  6 10:32:16 yanghang kernel: ata5.00: configured for UDMA/100
    
12. May  6 10:32:16 yanghang kernel: ata5: EH complete
    
13. May  6 10:34:27 yanghang kernel: ata5.00: exception Emask 0x52 SAct 0x0 SErr 0x880d00 action 0x6
    
14. May  6 10:34:27 yanghang kernel: ata5.00: BMDMA stat 0x26
    
15. May  6 10:34:27 yanghang kernel: ata5: SError: { UnrecovData Proto HostInt 10B8B LinkSeq }
    
16. May  6 10:34:27 yanghang kernel: ata5.00: failed command: READ DMA EXT
    
17. May  6 10:34:27 yanghang kernel: ata5.00: cmd 25/00:00:27:ac:d1/00:01:36:00:00/e0 tag 0 dma 131072 in
    
18. May  6 10:34:27 yanghang kernel:         res 51/84:6f:b6:ac:d1/84:00:36:00:00/e0 Emask 0x72 (host bus error)
    
19. May  6 10:34:27 yanghang kernel: ata5.00: status: { DRDY ERR }
    
20. May  6 10:34:27 yanghang kernel: ata5.00: error: { ICRC ABRT }
    
21. May  6 10:34:27 yanghang kernel: ata5: hard resetting link
    
22. May  6 10:34:28 yanghang kernel: ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
    
23. May  6 10:34:28 yanghang kernel: ata5.00: configured for UDMA/100
    
24. May  6 10:34:28 yanghang kernel: ata5: EH complete
    
25. May  6 10:34:34 yanghang kernel: ata5.00: limiting speed to UDMA/33:PIO4
    
26. May  6 10:34:34 yanghang kernel: ata5.00: exception Emask 0x50 SAct 0x0 SErr 0x280900 action 0x6
    
27. May  6 10:34:34 yanghang kernel: ata5.00: BMDMA stat 0x26
    
28. May  6 10:34:34 yanghang kernel: ata5: SError: { UnrecovData HostInt 10B8B BadCRC }
    
29. May  6 10:34:34 yanghang kernel: ata5.00: failed command: READ DMA EXT
    
30. May  6 10:34:34 yanghang kernel: ata5.00: cmd 25/00:00:3f:0c:c4/00:01:35:00:00/e0 tag 0 dma 131072 in
    
31. May  6 10:34:34 yanghang kernel:         res 51/84:2f:0e:0d:c4/84:00:35:00:00/e0 Emask 0x70 (host bus error)
    
32. May  6 10:34:34 yanghang kernel: ata5.00: status: { DRDY ERR }
    
33. May  6 10:34:34 yanghang kernel: ata5.00: error: { ICRC ABRT }
    
34. May  6 10:34:34 yanghang kernel: ata5: hard resetting link
    
35. May  6 10:34:34 yanghang kernel: ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
    
36. May  6 10:34:34 yanghang kernel: ata5.00: configured for UDMA/33
    
37. May  6 10:34:34 yanghang kernel: ata5: EH complete
    
38. May  6 10:50:42 yanghang kernel: ata5.00: exception Emask 0x52 SAct 0x0 SErr 0x880d00 action 0x6
    
39. May  6 10:50:42 yanghang kernel: ata5.00: BMDMA stat 0x26
    
40. May  6 10:50:42 yanghang kernel: ata5: SError: { UnrecovData Proto HostInt 10B8B LinkSeq }
    
41. May  6 10:50:42 yanghang kernel: ata5.00: failed command: READ DMA EXT
    
42. May  6 10:50:42 yanghang kernel: ata5.00: cmd 25/00:00:ef:b6:fa/00:01:16:00:00/e0 tag 0 dma 131072 in
    
43. May  6 10:50:42 yanghang kernel:         res 51/84:0f:de:b7:fa/84:00:16:00:00/e0 Emask 0x72 (host bus error)
    
44. May  6 10:50:42 yanghang kernel: ata5.00: status: { DRDY ERR }
    
45. May  6 10:50:42 yanghang kernel: ata5.00: error: { ICRC ABRT }
    
46. May  6 10:50:42 yanghang kernel: ata5: hard resetting link
    
47. May  6 10:50:42 yanghang kernel: ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
    
48. May  6 10:50:42 yanghang kernel: ata5.00: configured for UDMA/33
    
49. May  6 10:50:42 yanghang kernel: ata5: EH complete

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请教一下，这段错误信息是什么原因？

liaosnet

备份该盘...然后更换新盘..

lex_001

出现只读提示一般是inode分区表出了问题，这个好像有修复手段，你可以查查
暴力修复就是格式化，如果还有这样的问题，需要把硬盘拿出来，底层格式化MBR。
实际上格式化就是上文件系统的过程，所以说只读是你硬盘的文件系统出错，有兴趣可以挖掘根节点原因