[mythtv-users] Source of my IOBOUND problem?

[Brad DerManouelian]

On Jun 6, 2007, at 9:25 AM, Craig Huff wrote:

>> Date: Wed, 6 Jun 2007 07:49:11 +0100
>> From: "David Raine" <rainecc at gmail.com>
>> Subject: Re: [mythtv-users] Source of my IOBOUND problem?
>>
>> It looks like your HD subsystem is just not keeping up with that  
>> load.
>> hda is totally maxed.
>>
>> 1. Put in a 2nd HD on SATA (much faster bus subsystem if you have  
>> mobo support)
>> 2. Separate the OS/DB and the /video/recordings onto different HD's
>>
>> -David
>
>
> David,
>
> I believe you, but...
>
> I had been under the impression (apparently wrong) that three (3)  
> SD recording streams
> would not approach the available bandwidth of a standard  
> (reasonably current) PATA disk.
> Did I choose a clunker drive?

You also have to consider system overhead on the drive. mysql  
activity can cause lots of i/o and if you are short on memory, paging  
will bring your drive to its knees.