[mythtv-users] IVTV 0.8.1 and PVR 500 with new Samsung tuners
drescherjm at gmail.com
Sat Dec 2 21:30:50 UTC 2006
> No, remember that was loaded up with 1 tuner recording and one being
> viewed to simulate what would be left for the other tuner if it were
> to start recording. hdparm is sort of mystical as to where it gets
> it's values, but does give us an idea. I am using a promise SATA300
> TX4 controller with 5 seagate ST3250824AS drives (250MB each and
> SATA300) running in software RAID5. Here is a non loaded hdparm
Oh, Sorry. I glanced over that. Anyways the DMA problem I was referring to
was not anything to do with the hard drives it was the DMA used to transfer
from the hauppage card to memory.
tv1 mythtv # hdparm -Tt /dev/md2
> Timing cached reads: 1596 MB in 2.00 seconds = 797.50 MB/sec
> Timing buffered disk reads: 230 MB in 3.01 seconds = 76.40 MB/sec
These are the numbers I was looking for. Still a little low for raid5 as a
non raided seagate 7200.10 sata2 disk gets around that but I assume these
are last year drives.
# hdparm -tT /dev/sda
Timing cached reads: 1354 MB in 2.00 seconds = 677.44 MB/sec
Timing buffered disk reads: 232 MB in 3.01 seconds = 77.17 MB/sec
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