问题引出在Linux操作系统下，安装ceph分布式存储系统，在安装OSD时，执行了一条命令ceph-deploy disk zap osdnode1:/dev/sda3命令执行失败，日志如下：
[ceph_deploy.cli][INFO ] ceph-deploy options:
[ceph_deploy.cli][INFO ] username : None
[ceph_deploy.cli][INFO ] verbose : False
[ceph_deploy.cli][INFO ] overwrite_conf : False
[ceph_deploy.cli][INFO ] subcommand : zap
[ceph_deploy.cli][INFO ] quiet : False
[ceph_deploy.cli][INFO ] cd_conf : <ceph_deploy.conf.cephdeploy.Conf instance at 0x12be4d0>
[ceph_deploy.cli][INFO ] cluster : ceph
[ceph_deploy.cli][INFO ] func : <functiondisk at 0x12b6938>
[ceph_deploy.cli][INFO ] ceph_conf : None
[ceph_deploy.cli][INFO ] default_release : False
[ceph_deploy.cli][INFO ] disk : [('osdnode1','/dev/sda3', None)]
[ceph_deploy.osd][DEBUG ] zapping /dev/sda3 on osdnode1
[osdnode1][DEBUG ] connection detected needforsudo
[osdnode1][DEBUG ] connected to host: osdnode1
[osdnode1][DEBUG ] detect platform information from remote host
[osdnode1][DEBUG ] detect machine type
[osdnode1][DEBUG ] find the location of an executable
[ceph_deploy.osd][INFO ] Distro info: CentOS 6.7 Final
[osdnode1][DEBUG ] zeroing last few blocks of device
[osdnode1][DEBUG ] find the location of an executable
[osdnode1][INFO ] Running command: sudo /usr/sbin/ceph-disk zap /dev/sda3
[osdnode1][DEBUG ] CreatingnewGPT entries.
[osdnode1][DEBUG ] Warning: The kernel is still using the old partition table.
[osdnode1][DEBUG ] Thenewtable will be used at the next reboot.
[osdnode1][DEBUG ] GPT data structures destroyed! You may now partition the disk using fdisk or
[osdnode1][DEBUG ] other utilities.
[osdnode1][DEBUG ] CreatingnewGPT entries.
[osdnode1][DEBUG ] Warning: The kernel is still using the old partition table.
[osdnode1][DEBUG ] Thenewtable will be used at the next reboot.
[osdnode1][DEBUG ] The operation has completed successfully.
[osdnode1][WARNING] Traceback (most recent call last):
[osdnode1][WARNING] File"/usr/sbin/ceph-disk", line 2994,in<module>
[osdnode1][WARNING] main()
[osdnode1][WARNING] File"/usr/sbin/ceph-disk", line 2972,inmain
[osdnode1][WARNING] args.func(args)
[osdnode1][WARNING] File"/usr/sbin/ceph-disk", line 2690,inmain_zap
[osdnode1][WARNING] zap(dev)
[osdnode1][WARNING] File"/usr/sbin/ceph-disk", line 1071,inzap
[osdnode1][WARNING] update_partition('-d', dev,'zapped')
[osdnode1][WARNING] File"/usr/sbin/ceph-disk", line 1033,inupdate_partition
[osdnode1][WARNING] dev,
[osdnode1][WARNING] File"/usr/sbin/ceph-disk", line 306,incommand
[osdnode1][WARNING] **kwargs)
[osdnode1][WARNING] File"/usr/lib64/python2.6/subprocess.py", line 642,in__init__
[osdnode1][WARNING]
[osdnode1][WARNING] File"/usr/lib64/python2.6/subprocess.py", line 1234,in_execute_child
[osdnode1][WARNING]
[osdnode1][WARNING] File"/usr/lib64/python2.6/pickle.py", line 1374,inloads
[osdnode1][WARNING]
[osdnode1][WARNING] File"/usr/lib64/python2.6/pickle.py", line 858,inload
[osdnode1][WARNING]
[osdnode1][WARNING] File"/usr/lib64/python2.6/pickle.py", line 971,inload_string
[osdnode1][WARNING]
[osdnode1][WARNING] LookupError: unknown encoding: string-escape
[osdnode1][ERROR ] RuntimeError: command returned non-zero exit status: 1
[ceph_deploy][ERROR ] RuntimeError: Failed to execute command: /usr/sbin/ceph-disk zap /dev/sda3
实际影响我osdnode1设备无法正常工作,体现在:相关命令罗列后不会返回结果 执行创建等命令失败
[root@osdnode1 home]# df -h
-bash:/bin/df: Input/outputerror
[root@osdnode1 home]# mount
/dev/sda3on /typeext4 (rw)
proc on/proctypeproc (rw)
sysfs on/systypesysfs (rw)
devpts on/dev/ptstypedevpts (rw,gid=5,mode=620)
tmpfs on/dev/shmtypetmpfs (rw)
/dev/sda1on/boottypeext4 (rw)
none on/proc/sys/fs/binfmt_misctypebinfmt_misc (rw)
mount: warning:/etc/mtabis not writable (e.g.read-only filesystem).
It's possible that information reported bymount(8) is not
up todate. For actual information about systemmountpoints
check the/proc/mountsfile.
[root@osdnode1 home]# df -h
-bash:/bin/df: Input/outputerror
一直报IO error. 解决办法后通过如下方法修复：命令执行过程中一路yes next就OK fsck -t ext4 /dev/sda3
修复成功后
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