[mythtv-users] An LVM'd drive died! What do I do...

[Bryan Halter]

David Bennett wrote:
> ... fortunately this has not happened (yet!) but I am preparing for the worst.
>
> Jarod's MythTV guide recommends LVM as an option to create nice and
> big MythTV partitions. I followed the guide and have recently added
> another 250G to my original drive with Mytbtv-users help.
>
> A hard drive failure on my Windows computer got me thinking. If one of
> the drives in the LVM group dies, what happens? Does the whole
> partition go down? Do you only lose files that were stores on the LVM
> drive?
>
> Better yet, if a drive dies, how do you replace it? DO you have to
> Shrink the LVM and do stuff with it, or just pop in a new drive and it
> automatically works?
>
> LVM seems like a great idea, but now that I have set it up, I am
> worried that 1 drive failig will result in the loss of 2 drives of
> data.
>
> Any input would be appreciated!
>
> david
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>   
As far as I know if you lose a disk in an LVM dies you're SOL.  If you 
need redundancy and want a scheme that allows you to have a huge folume 
look into RAID-5.  It allows you n-1 size so you need to start out with 
atleast 3 disks, with 1 disk being overhead but as long as you only lose 
1 disk at a time you will be able to survive a failure.