[mythtv-users] TFW, Error: Write() -- IOBOUND ..... and mythbox crashed

[Ma Begaj]

2007/10/18, Kevin Kuphal <kuphal at dls.net>:
> On 10/18/07, Ma Begaj <derliebegott at gmail.com> wrote:
> > Hi,
> >
> > I had yesterday three recordings running at the same time (1x pvr150,
> > 1x pvr500). At the same time, I was watching a recording. And suddenly
> > my mythbox crashed and I had to reset it.
> >
> > I checked syslog and found nothing, but I found something in
> > mythbackend log file:
> >
> > 2007-10-17 23:32:05.673 TFW, Error: Write() -- IOBOUND begin cnt(2048) free(835)
> > 2007-10-17 23:32:10.724 TFW, Error: Write() -- IOBOUND end
> > 2007-10-17 23:32:10.731 TFW, Error: Write() -- IOBOUND begin cnt(2048)
> > free(1095)
> > 2007-10-17 23:32:10.735 TFW, Error: Write() -- IOBOUND end
> > 2007-10-17 23:47:10.183 TFW, Error: Write() -- IOBOUND begin cnt(2048)
> > free(1503)
> >
> > I checked the older mythbackend logs and I found more of these
> > messages in the last few days, usually when I had 2-3 recordings (SD)
> > running and watching at the same time.
> >
> > I have two IDE hard disks (2x 160GB WD) and 1GB single channel RAM.
> > One of these disks has a system and home partitions and a partition
> > for myth recordings. 2nd disk is only one partition for recordings.
> > Everything is ReiserFS. I was thinking to change it to XFS these days.



> The biggest thing I did to solve this problem was to move the /var
> partition with the database and logs off the same physical disk that
> my recordings are happening on.  Recording and playback generate a
> fair amount of MySQL traffic.  This was causing too much contention
> for the disks when the same disk is also used for writing recordings.
> Do that, and I think this will go away.

I was thinking about that and that would mean that I would have to put
one more disk in the case, because I have two disks. I have one more
160GB WD laying around somewhere. I just have to find place in Antec
Fusion for the third disk :) ... The simplest thing to do would be to
buy one much bigger disk...

Thanks.

M.