Hi Alex, On 10/10/2017 05:56 AM, Alexander Shenkin wrote: > Thanks Reindl. Here's what I have installed (no evidence of raid-check > available on my system): > > $ cat /etc/cron.d/mdadm > 57 0 * * 0 root if [ -x /usr/share/mdadm/checkarray ] && [ $(date +\%d) > -le 7 ]; then /usr/share/mdadm/checkarray --cron --all --idle --quiet; fi > This is *really* good news. If this has been running once a month as shown, and you've already noted that you are dealing properly with timeout mismatch, then your arrays are in fact reasonably scrubbed. Which means the pending sector found by a smartctl background scan is likely in a non-array data area. And if not, the next scrub will fix it. You can run checkarray yourself if you don't want to wait. >>> Is this something I should run now? I figure it's a bad idea to push >>> an array that is starting to degrade... haven't had a chance to >>> replace the drive yet, but will get to it this week. Probably best >>> to start the scrubbing routines once I have 4 good drives in there I >>> figure... >> >> NO - never put any load you can avoid on degraded arrays > > thanks, i won't. If I read your OP correctly, your array is *not* degraded -- it just has a pending URE on one drive. You are still redundant, and your system is scrubbing once a month. FWIW, I don't replace drives just for pending sectors -- they are expected occasionally per drive specs. So long as check scrubs regularly complete, I replace drives when actual relocations hit double digits. You are fine. Your array is fine. Long timeouts can cause application timeouts and user freak-outs, so your Seagates are less than ideal, but your system is *fine*. Consider using the new drive to convert to raid6. If you have other reasons to stay with raid5, then add it as as spare, then use mdadm's --replace operation to swap out the drive with the pending sector. Phil -- 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
