On 2013-04-11 02:52, James Harper wrote:
Interesting. And somewhat alarming!
What does smartctl -H and smartctl -a report for those drives?
Does "11008" mismatches mean that 11008 bytes were found to be different, or that 11008 sectors were found to be different? In either case I would suggest to you that you have a serious problem with your servers and that this is not normal. I have many servers running linux md RAID1 and have never seen such a thing.
The output of 'smartctl -a' is a superset of 'smartctl -H'. Output of the former is attached. I'm not sure whether mdadm is measuring blocks or bytes. If this were just one server, I'd be concerned that something is more wrong than it should be, but given there are at least 3 servers, at 2 different sites, with different sorts of disks, and running different distros and software, I'm less worried. Do your systems do regular RAID checks to confirm there are no mismatches, as opposed to you just not knowing about them? -- Regards, Matthew Cengia