[mythtv-users] ivtv driver went nuts...

[James Pifer]

I'm still having a few issues with my new myth box. Last night I had two
recordings get totally hosed. Looks like the ivtv drivers went whacky. I
restarted the box and it completed the in progress recording ok, and the
next two recordings went fine. I have the mythtv log here:
http://www.obrien-pifer.com/mythtv/ivtvfail.txt

I was copying some videos files at the start of the first recording that
had problems. I didn't think this would cause issues. The box is pretty
powerful, Dual Xeon 1.8 Ghz processes, but RAM is only 512. Hard drive
is a Seagate Ultra ATA 100 750 GB. Stats for it are:
# hdparm -i /dev/hda

/dev/hda:

 Model=ST3750640A, FwRev=3.AAC, SerialNo=3QD03PC7
 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
 BuffType=unknown, BuffSize=16384kB, MaxMultSect=16, MultSect=16
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455
 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4
 DMA modes:  mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
 AdvancedPM=no WriteCache=enabled
 Drive conforms to: Unspecified:  ATA/ATAPI-1 ATA/ATAPI-2 ATA/ATAPI-3
ATA/ATAPI-4 ATA/ATAPI-5 ATA/ATAPI-6 ATA/ATAPI-7

 * signifies the current active mode

# hdparm -tT /dev/hda

/dev/hda:
 Timing cached reads:   1080 MB in  2.00 seconds = 539.44 MB/sec
 Timing buffered disk reads:  150 MB in  3.02 seconds =  49.75 MB/sec

Was this a fluke or something I should be concerned with?
Was it due to copying files and the system was busy?
Searching about this issue I came across some things saying that some
services could screw up DMA? Are there services on FC5 like cpuspeed
that I should be turning off?

As always, any suggestions appreciated. 

James