Re: Changing mount options without restarting

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On 12/1/18 1:49 AM, Patrick O'Callaghan wrote:
> On Sat, 2018-12-01 at 08:03 +0800, Ed Greshko wrote:
>> On 12/1/18 6:33 AM, Patrick O'Callaghan wrote:
>>> I'm getting "filesystem not responding" messages from an NFS-mounted
>>> NAS which I suspect is just slow (it spins down its disks when not in
>>> use). I'm using automount and that appears to be related as it never
>>> used to happen with normal mounting. I've changed the 'timeo' parameter
>>> in the /etc/fstab line and run 'mount -a' but the mount parameters for
>>> the filesystem have not changed. I've also restarted anything that
>>> seems relevant from systemd:
>>>
>>> systemctl restart storage-Backups.mount
>>> and
>>> systemctl restart proc-fs-nfsd.mount
>>> and
>>> systemctl restart proc-sys-fs-binfmt_misc.automount
>>>
>>> to no effect.
>>>
>>> How can I get this to work without rebooting?
>>>
>>
>> I know you have it working....
>>
>> But I did verify that unmounting and remounting with a changed parameter has no effect.
> 
> Except that it did have an effect. I used 'umount -f ...' and then
> 'mount -a' and it worked.

"mount -a" will only mount things that aren't already mounted. It
worked after the "umount -f" because that forced the unmount first, then
the "mount -a" would remount.
----------------------------------------------------------------------
- Rick Stevens, Systems Engineer, AllDigital    ricks@xxxxxxxxxxxxxx -
- AIM/Skype: therps2        ICQ: 226437340           Yahoo: origrps2 -
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