[mythtvnz] Adding a HDD with existing myth directories

[Noel & Di]

I'm not familiar with how storage groups work... can you somehow assign 
different paths to them?

Nick Rout wrote:

>LVM has problems. One disk goes down and you lose the lot. By all
>accounts mythtv's relatively new storage groups feature is more
>flexible and safer. I am not sure what version it appeared in, or
>whether it is only in trunk.
>
>On Nov 25, 2007 3:50 PM, Corrin Lakeland <lakeland at gmail.com> wrote:
>  
>
>>I personally would do it a little differently:
>>
>>Build the new one - test it and make sure it is all good.  Make sure
>>you set it up with recordings on an LVM partition
>>Copy all recordings across
>>Export and import the recordings database
>>Check the new one works perfectly with the recordings
>>
>>Once everything is perfectly happy with the new box, then move the
>>hard drive out of the old machine and into the new machine
>>format the old hard drive as LVM
>>vgextend the LVM partition with recordings on
>>resize the filesystem
>>
>>Difference in my approach is that:
>>        1) You have slightly more hassle in the initial setup of the new
>>machine (have to use LVM)
>>        2) You have a very slightly safer transition - at all points you
>>have at least one copy of mythtv running with all recordings
>>        3) You get more space for recordings (size of the new drive + the
>>size of the old drive)
>>        4) You have slightly higher risk of data loss long term (a LVM hard
>>drive failing will lose all files in the group).
>>        5) You have a conceptually simpler result (a single huge directory
>>for recordings rather than two medium-sized directories)
>>
>>I guess go with whichever appeals more :)
>>
>>Corrin
>>
>>
>>On 25/11/2007, at 8:40 AM, Criggie wrote:
>>
>>    
>>
>>>Noel & Di wrote:
>>>      
>>>
>>>>I have built a replacement MythBox using Mythbuntu 7.01 (Tier 1
>>>>yaaay!)
>>>>and want to add the HDD from the soon to be decommissioned Knoppmyth
>>>>R5F27 box.  Any tips & tricks for this without reducing the WAF. (I
>>>>intend to use only the recordings from the old driver & delete the
>>>>OS)
>>>>        
>>>>
>>>Build the new one - test it and make sure its all good.  Copy some
>>>of the
>>>recordings across to test.   You'll also need to export and import the
>>>recordings database, else its just a bunch of files.
>>>
>>>http://www.mythtv.org/wiki/index.php/
>>>Upgrading_from_0.18.1_to_0.19_on_Fedora_4_from_ATrpms#Create_a_backup_
>>>of_your_database
>>>gives a few hints about backing up the database.
>>>
>>>THEN move the recordings HDD to the new box and mount it over the
>>>recordings directory, so that the files appear in the same place.  You
>>>should reimport the recordings database again at this stage.
>>>
>>>Then when its all done and dusted, use the old mythbox as a test
>>>platform.
>>>Whether it should be a slave backend to the main system or not, I
>>>can't
>>>comment.
>>>
>>>--
>>>Criggie
>>>
>>>http://criggie.dyndns.org/
>>>
>>>
>>>
>>>
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>>>
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