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As a longtime mdadm user is was just experiencing a disk error and remembered that I configured a Auto Mail reporting for mdadm on disk errors.

Therefore i just had to insert my Mail address inside /etc/mdadm/mdadm.conf

MAILADDR [email protected]

But I really missed that one out on FreeBSD. And as my ZFS RAID6 is now running over half a year i thought of what would happen if a disk would experience a failure?

I never configured any external mail address. Is there an easy way to accomplish and test this?

Like on mdadm:

sudo mdadm –monitor –scan –test

And how would i do it on Linux with ZoL (ZFS on Linux)?

EDIT: Sorry i meant AUTOMATED Reporting. not scheduled.

I know i could have build a script and parse zpool status -X every minute. but I think this is not a very elegant approach of accomplishing the reporting problem. It would be better to be notified instantly on a disk failure (like mdadm)

EDIT[2]: Thank you for your advices, but no im stuck with some scripting issues, fould someone help me with my for loop problem in /bin/sh here -> PASTEBIN

EDIT[3]: Got my for loop problem. :) (update in PASTEBIN)

Any more advices for my script?

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2 Answers 2

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Run a regular script (cron) that checks zpool status -x output. Longer-term, the ZFS on Linux project is working towards this in the form of an event daemon. The Solaris-derived systems had access to the Fault Management Architecture.

As far as automated reports, even commercial solutions like NexentaStor use scheduled checks. There's nothing wrong with that.

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Something like this:

[root@mdmarra ~]# zpool status -x all pools are healthy

Versus something awful like:

[root@mdmarra ~]# zpool status -x pool: vol1 state: UNAVAIL status: One or more devices are faulted in response to IO failures. action: Make sure the affected devices are connected, then run 'zpool clear'. see: http://www.sun.com/msg/ZFS-8000-JQ scan: scrub repaired 0 in 1h15m with 0 errors on Sun Jul 28 21:15:10 2013 config: NAME STATE READ WRITE CKSUM vol1 UNAVAIL 0 0 0 insufficient replicas mirror-0 DEGRADED 0 0 0 c1t0d0 UNAVAIL 0 0 0 cannot open c2t0d0 ONLINE 0 0 0 mirror-1 DEGRADED 0 0 0 c1t1d0 UNAVAIL 0 0 0 cannot open c2t1d0 ONLINE 0 0 0 mirror-2 DEGRADED 0 0 0 spare-0 UNAVAIL 0 0 0 insufficient replicas c1t2d0 UNAVAIL 0 0 0 cannot open c2t8d0 UNAVAIL 0 0 0 cannot open c2t2d0 ONLINE 0 0 0 mirror-3 DEGRADED 0 0 0 c1t3d0 UNAVAIL 0 0 0 cannot open c2t3d0 ONLINE 0 0 0 mirror-4 DEGRADED 0 0 0 c1t4d0 UNAVAIL 0 0 0 cannot open c2t4d0 ONLINE 0 0 0 mirror-5 UNAVAIL 0 0 0 insufficient replicas c1t5d0 UNAVAIL 0 0 0 cannot open c2t5d0 FAULTED 0 0 0 too many errors cache c3t5d0 ONLINE 0 0 0 spares c2t8d0 UNAVAIL cannot open errors: No known data errors
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  • Thank you but i just edited my question to be a bit more precise. I meant something automated, not a cronjob or something else. Commented Aug 8, 2013 at 7:19
  • Updated. There's nothing wrong with periodic checks. Commented Aug 8, 2013 at 7:32
  • Ok, so could someone give me an advice on for loops in /bin/sh this is what i currently got PASTEBIN Commented Aug 8, 2013 at 10:28
  • Thanks, already got all is need. check the Pastebin link, to see the results. Commented Aug 8, 2013 at 11:40
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Try zfswatcher, it works really well for me.

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  • Ooooh, let me try this. Commented Aug 8, 2013 at 7:17

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