[KLUG Members] mount and umount

[Mike Williams]

Eric Beversluis wrote:

>On Thu, 2006-01-19 at 12:14 -0500, Michael Lueck wrote:
>  
>
>>On Thu, 19 Jan 2006 12:04:03 -0500, Eric Beversluis wrote:
>>
>>    
>>
>>>What is "sync"?
>>>      
>>>
>>Commits work to the physical disks... kind of a flush kind of an idea.
>>
>>Sounds like here in lies the problem, hua?! LOL ;-) ALWAYS sync after you are
>>done umount'ing.
>>
>>    
>>
>AFTER unmounting? What gets written to where then if the filesystem in
>question is already unmounted?
>
>just the command 'sync'? Or options?
>
>EB
>  
>
I second that!  I understand that a mounted filesystem might have data 
that is sitting in RAM buffers before being actually written to the 
disk, so powering off a mounted filesystem is inherently dangerous.  
(This is usually an acceptable trade-off for the performance advantage 
of bundling the disk write actions).  But once you unmount it, isn't 
sync implied as part of the umount process?