[mythtv] problem with HDTV in Australia
Hamish Moffatt
hamish at cloud.net.au
Fri Jul 29 04:59:23 EDT 2005
On Thu, Jul 28, 2005 at 09:26:44PM -0400, Daniel Kristjansson wrote:
> My first guess would be that you should make sure DMA is working. Then
> make sure that there aren't a lot of errors coming out of some driver.
> hdparm and dmesg are your friends here.
> bash-2.05b# hdparm -tT /dev/hda
>
> /dev/hda:
> Timing cached reads: 3376 MB in 2.00 seconds = 1688.26 MB/sec
> Timing buffered disk reads: 144 MB in 3.04 seconds = 47.44 MB/sec
Just to confirm this is not the problem; on my PATA and SATA disks,
respectively (same model disk, but different interface types):
/dev/hda:
Timing cached reads: 1660 MB in 2.00 seconds = 829.30 MB/sec
Timing buffered disk reads: 152 MB in 3.04 seconds = 50.02 MB/sec
/dev/sda:
Timing cached reads: 1664 MB in 2.00 seconds = 831.30 MB/sec
Timing buffered disk reads: 164 MB in 3.01 seconds = 54.55 MB/sec
/dev/hda:
multcount = 0 (off)
IO_support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
geometry = 19457/255/63, sectors = 160041885696, start = 0
The best suggestion I've heard is to use TS mode instead of PS.
Hamish
--
Hamish Moffatt VK3SB <hamish at debian.org> <hamish at cloud.net.au>
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