Hello, I have a brand new server with a RAID-10 array. The drives are a SAS JBOD (mptsas) which I'm driving using Linux mdraid raid10. Unfortunately, although the server did burn-in fine, once put in production I have so far had multiple cases (about once every 24 hours) of the raid10 failing, with a mirror pair dropping out in very short succession: Jun 2 20:23:05 terminus kernel: [83595.614689] md/raid10:md4: Disk failure on sdb6, disabling device. Jun 2 20:23:05 terminus kernel: [83595.614689] md/raid10:md4: Operation continuing on 3 devices. Jun 2 20:23:05 terminus kernel: [83595.703106] md/raid10:md4: Disk failure on sdc6, disabling device. Jun 2 20:23:05 terminus kernel: [83595.703106] md/raid10:md4: Operation continuing on 2 devices. Jun 2 20:23:05 terminus kernel: [83595.789234] md4: WRITE SAME failed. Manually zeroing. Unfortunately, those two devices that just dropped out are of course the mirrors of each other, causing filesystem corruption and shutdown in very short order. There are no other kernel messages from the same time, and given the timing (less than 90 ms apart) it would appear that this is a timeout of some kind and not an actual disk failure. Are there any tunables I can tweak, or do I have a $4000 paperweight? -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
