[mythtv-users] HDHomeRun corruption

Michael D. O'Brien obrienmd at gmail.com
Fri Feb 13 22:33:37 UTC 2009


> > obrienmd at mythtv:~$ ifconfig
> > eth1 Link encap:Ethernet HWaddr 00:21:85:1a:c0:17
> > inet addr:192.168.123.111 Bcast:192.168.123.255 Mask:255.255.255.0
> > inet6 addr: fe80::221:85ff:fe1a:c017/64 Scope:Link
> > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> > RX packets:259430513 errors:0 dropped:671119702 overruns:0 frame:0
>
> That's *way* too many dropped packets for a healthy network interface.
>
> A packet will be dropped when it's received by the network card when
> its internal buffer is full.  The CPU is responsible for periodically
> emptying this buffer, which suggests that something is preventing this
> from happening frequently enough, such as high disk I/O load or
> something like that.


I figured this.  However, even when recording 4 HD streams at once, 'iostat
-xk 1' output shows disk utilization at well below 50% for each of the RAID1
disks that recordings are written to.  Any other thoughts as to what could
cause all of these dropped packets?
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