On Thu, 10 Dec 2009, Adam Nielsen wrote: >> Watching the disk array this morning, it appeared that you'd get a period of >> normal blinking activity lights, then it'd all go silent for maybe 5 seconds, >> then solid on for a short while, then back to blinking. This looked odd to >> me. >> >> Pointers as to where I should start looking? > > It could be a hardware issue. That could cause the system to stall, > retrying some I/O operation until it eventually succeeds and continues > normally. You don't have any errors in your logs? Does the RAID > controller report any problems with your disks?
No errors that I can find, omsa doesn't obviously show anything as degraded. This only appears to be occurring under particular heavy load over NFS. I can merrily run iozone against the array and the machine remains responsive, and the performance looked reasonable. I need to find a reliable way of triggering this behaviour. A looping once-per-second sync, made the machine reliably available, although I suspect this was just treating the symptoms. jh _______________________________________________ Linux-PowerEdge mailing list [email protected] https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
