> [email protected] wrote: >> I use 4 disks in a software RAID 5 array. How >> would one sort out or even find out if this could be the source of a >> problem? > > It's pretty easy. Wait until the symptoms occur (by default the mdadm > package on Ubuntu schedules a rebuild starting early in the AM on the > first Sunday of the month). Then launch the system monitor from the GUI > or use the equivalent command line tools (ps or top) to find a process > with a name like md0_resync and drop its priority to something low, like > -15. If that resolves the symptom, then you should install a permanent > fix. > > On my system I modified /etc/cron.d/mdadm to run a few additional > commands to drop the priority. Onto the end of the existing command > line, I tacked: > && sleep 60 && renice 15 `pidof -s -x md1_resync` > /dev/null > > and that permanently solved it for me. > > Prior to this I spent months playing around with the MD driver parameter > speed_limit_min, both manually via /proc, and via /etc/sysctl.conf > (dev.raid.speed_limit_min), but eventually determined that the system > was CPU bound rather than I/O bound during rebuilds. >
Hmmm maybe not so easy in my case. My Asus MB uses an onboard Nvidia "software RAID" that is controlled at the bios level. The only involvement for the 'nix OS is to ensure that the kernel can see the array properly (which was no picnic). Any ideas on that front? I am not sure how one even determines if it's an issue. Scott ------------------------------------------------------------------------------ Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com _______________________________________________ Mvpmc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mvpmc-users mvpmc wiki: http://mvpmc.wikispaces.com/
