customer had a NFS share before, they store the backup files on the storage, when the file system is fault, they can't access to these files.
we have to check what kind of factor will cause the problem, so we have to carry out the steps bellow one by one:
1. check the status of the array. Login with ISM to check the status of disks, RAIDs and LUNs, if there are alarms, we have to fix it first.
2. check the status of the physical link, run the command ''vxdmpadm getsubpaths'' to check the Ultrapath.
3. check the status of the cluster with the command ''gabconfig -a'' with the support account.
4. check the status of the file system with the commands bellow:
Run the command ''cfsmntadm display'' to check the status of the mounted file system
Run the command ''echo “8192B.p S” | fsdb -t vxfs /dev/vx/dsk/sfsdg/file system name |grep flags'' to check if the flag of each file system is normal.
Run the command ‘vxdg list’ to check if the DG is normal
Run the command ‘vxdisk list’ to check the status of disks
we use command ‘scanbus’ to import the DG information if the DG infomation miss
5. after all the information we checked is normal, we can run the command ''cfsmount /vx/file system name'' to mount the other file system
6. Then with the command ''cfsmntadm display'' to check the status of the mounted file system again.
7. at last run the command ''network ip addr online ipaddress nodename'' to restore the businees IP.
the file system fault may be caused by the factors bellow:
1. the physical link between the N8000 and backend array is break down
2. the LUN is fault in the array
3. the cluster service is abnormal at this moment