[mythtv-users] How much horespower for frontend?
James Pifer
jep at obrien-pifer.com
Tue Sep 26 19:54:09 UTC 2006
On Tue, 2006-09-26 at 12:56 -0500, Jason wrote:
> Im not sure you have DMA enabled on your drives, which could cause you
> all sorts of woes. For example, my timed cached reads on a 1.6ghz
> machine are 1065 MB/sec. Let your box settle down a bit and then run
>
> hdparm -d1 /dev/hdaWhatever
>
> then run that hdparm -tT again
>
I got this:
[root at mythtv ~]# hdparm -d1 /dev/hda1
/dev/hda1:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Invalid argument
using_dma = 1 (on)
[root at mythtv ~]# hdparm -tT /dev/hda1
/dev/hda1:
Timing cached reads: 608 MB in 2.00 seconds = 303.62 MB/sec
Timing buffered disk reads: 118 MB in 3.01 seconds = 39.16 MB/sec
[root at mythtv ~]#
[root at mythtv ~]# hdparm -d1 /dev/hdd1
/dev/hdd1:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Invalid argument
using_dma = 1 (on)
[root at mythtv ~]# hdparm -tT /dev/hdd1
/dev/hdd1:
Timing cached reads: 596 MB in 2.00 seconds = 298.07 MB/sec
Timing buffered disk reads: 70 MB in 3.02 seconds = 23.19 MB/sec
[root at mythtv ~]#
Can test whether it affected anything with playback yet.
James
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