Lonnie Abelbeck wrote:
> On Sep 23, 2008, at 1:04 PM, David Kerr wrote:
> 
>> Running with a unionfs setup... is there a way to get rid of the  
>> notion of a key disk... why do I need a /mnt/kd in the first place?  
>> (I understand why it was needed histrorically, but it doesn seems  
>> necessary now on CF/unionfs setups)  It just adds confusion  
>> particularly to directory hierarchy. It also unnecessarily holds  
>> configuration files that are unchanged from defaults.
>>
>> Thoughts?
>> David

David,

The decision was made to retain the key disk for backwards compatibility 
at the very least through the 0.6 series.  It will be a mess to untangle 
and may create more of a mess than removing it solves.  We are talking 
about it, even if not publicly.

> In addition, I don't use unionfs for my /mnt/kd/ directory, but rather  
> a separate partition.  I feel this is the most robust configuration,  
> but maybe that is just me. :-)

The earlier implementations (which were never official releases) had an 
older version of unionfs.  Since upgrading to the 2.4 version of 
unionfs, it's been very reliable and consistent.  The 0.6.1 images 
contain a 'movekd' script which walks you through moving your key disk 
files to your unionfs partition.

> The keydisk idea clutters the development side a little, but it is  
> there, and it works, and un-cluttering runs a high risk of bugs.   
> Hopefully the user benefits from a single backup/restore directory out- 
> weighs the development issues.  Possibly a little more work is  
> required to make sure all the useful files can be saved in the /mnt/ 
> kd/ path.
>
> While unionfs has been a huge benefit to astLinux, it can be quite  
> confusing.  Knowing whether a non-/mnt/kd/ file will be mapped to 
> flash or memory is not always obvious.

We've made some very huge fundamental changes from the 0.4 releases. 
Unionfs was one of them.  This removed the idea of having to constantly 
change the mount status of the / partition.  Unionfs allows storing 
passwords, users etc through version updates.  It overlays files on top 
of the existing file structure.  I would argue that backing up a single 
unionfs system may be easier/cleaner since everything is in one 
directory.  While it's not recommended to manually modify files directly 
on the unionfs partition, you can look at which files are on unionfs by 
looking at /oldroot/mnt/asturw.

Darrick

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