[mythtv-users] MythTV and LVM

[PAUL WILLIAMSON]

>>> thehappyfunball at gmail.com 01/31/06 9:30 AM >>>
> I have two quick questions about setting up MythTV to store its 
> data on an LVM array.
> 
> - After a certain amount of time, can I set individual drives 
> to spin down when the data on that particular drive isn't 
> being accessed?  (If I have shows on a hard disk in the 
> array that aren't being watched in a couple of days, I 
> would like for that drive to go offline for a while.)

I'm not sure what the motivator here is, but I haven't figure out 
a way to spin down a drive in an LVM array.  Powering down 
an entire PC for a month saved me a grand total of ~4 USD.
I would suspect powering down 1 drive might save you 3 dollars 
over the course of a year.

> - Are there any other concerns for using LVM?  Are there any 
> serious speed penalties?

Yes, you are putting yourself in peril.  The more drives you 
add to an LVM array, the more likely you are to have total 
filesystem failure.  If one of the drives dies, your whole LVM 
array is pretty much done for.  Save some headache for 
a real raid solution.  This is my opinion, there are others 
here that swear by LVM.  I used to.  I no longer do and 
have since started saving for a real solution so I don't lose 
all my recordings (some irreplacable) again.

Paul