Linux File System Repair

1. The problem arises

under the Linux operating system, a CEPH distributed storage System was installed and a command was executed when the OSD was installed:

1	ceph-deploy disk zap Osdnode1:/dev/sda3

command execution failed with the following log:

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[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& gt; [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 a 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 a 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 is used at the next reboot. [Osdnode1][debug] GPT data Structures destroyed! 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 is used at the next reboot. [Osdnode1][debug] The operation has completed successfully. [osdnode1][warning] Traceback (most recent): [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 2. Actual impact

I osdnode1 the device is not working properly, reflected in:
Commands that do not return results after the list of related commands fail

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[email protected] home]# df-h -bash:/bin/df:input/outputerror [email protected] 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) are not Up todate. For actual information about Systemmountpoints check the/proc/mountsfile.   [email protected] home]# df-h -bash:/bin/df:input/outputerror

Always quote IO error.

3. Workaround

Then fix it by following this method: Yes next is OK during the command execution.

Fsck-t Ext4/dev/sda3

After successful repair

Linux File System Repair