[mythtv-users] thrashing hard drive

[Brad DerManouelian]

On Sep 24, 2008, at 4:06 PM, Bobby Gill wrote:

> On Wed, Sep 24, 2008 at 6:38 PM, Michael T. Dean <mtdean at thirdcontact.com 
> > wrote:
> On 09/24/2008 06:30 PM, Khanh Tran wrote:
> > I hate to add this "unpopular" thought about Linux filesystems, but
> > I've found defragging the filesystem to help thrashing.  I use xfs  
> as
> > my recording partition and it gets fragmented contrary to popular
> > belief.
> >
> > http://www.mythtv.org/wiki/index.php/XFS_Filesystem
>
> And I've found that having at least 1 filesystem (each of  
> approximately
> equal fullness) per capture card*** in my storage groups is the best  
> way
> to prevent fragmentation.  And, having at least 1 spindle (drive) per
> capture card*** is the best way to prevent lots of seeking during  
> recording.
>
> Mike
>
> *** I guess technically, due to multirec, you need at least 1  
> <whatever>
> per potential simultaneous recording (per virtual capture card?).
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> Sorry if I'm going OT in this thread but do any of you have your  
> MySQL Myth database(s) on separate drives/partitions from the drive/ 
> partition you capture to? Has it improved performance? I'm planning  
> on doing this as per another thread where it was recommended.

Yes, I imagine most people have it set up this way. I saw great  
improvements when I was using a single standard def capture card and  
recording/commflagging/watching all at the same time. I would get  
frequent pauses until I threw in a 40GB system drive I had laying  
around. I've since moved far beyond his setup (6 tuners, 2.5TB  
storage) and would never dream of putting mysql on the same drive as  
my recordings. I'm even considering moving mysql to its own drive  
separate from the system to help minimize loss and wear/tear on the  
drives.

-Brad

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