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Old 03-15-2016, 11:18 AM   #1
roarklebork
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NFS share on Centos 6.6 become read only on its own


Hello all,

This is my first post here so please bare with me. I am not the person who had originally configured NFS on this server and I have never first hand configured it myself. After this servers storage (DAS) experienced a drive failure we needed to rebuild the array as well as the LVM configurations. After doing this I had mounted the NFS share on all of the clients and everything seemed to be working correctly. when I came in the morning I had noticed that nothing had been written to the NFS shares as it should have. whenever I try to create a file I receive "touch: cannot touch `test.txt': Read-only file system". First thing i did was look at /etc/fstab on the server and the entry for the share is mounted as follows:

/dev/mapper/vg_servername_linuxBackup-lv_linuxBackup /mnt/linux_Backups ext4 defaults 0 0

This is /etc/fstab from the clients (both server and clients cannot write to it)

servername.domain.com:/mnt/linux_Backups/backup nfs _netdev,intr,nosuid,noexec,noatime,nfsvers=3


I did a little research and found that /etc/mtab has it listed as "rw" but /proc/self/mounts has it as "ro" It is my understanding that /proc/self/mounts is information that is supplied by the kernal, if this is the case how can I Change this so that it is listed as read and write?

Many thanks.
 
Old 03-16-2016, 03:11 AM   #2
MadeInGermany
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Try
Code:
mount -o remount /mnt/linux_Backups
If that does not work, try
Code:
exportfs -u /mnt/linux_Backups
umount/mnt/linux_Backups
fsck /mnt/linux_Backups
mount /mnt/linux_Backups
exportfs /mnt/linux_Backups
 
Old 03-29-2016, 05:40 PM   #3
buaku
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You might also look at the output from /var/log/messages. In my experience when a mount suddenly becomes read-only it means the drive was starting to get failures, so the system made it read only.
 
  


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