On 10/14/19 5:44 PM, Wols Lists wrote: > On 15/10/19 00:56, Curtis Vaughan wrote: >> I have reason to believe one HD in a RAID1 is dying. But I'm trying to >> understand what the logs and results of various commands are telling me. >> Searching on the Internet is very confusing. BTW, this is for and Ubuntu >> Server 18.04.2 LTS. > Ubuntu LTS ... hmmm. What does "mdadm --version" tell you? mdadm - v4.1-rc1 - 2018-03-22 >> It seems to me that the following information is telling me on device is >> missing. It would seem to me that sda is gone. > Have you got any diagnostics for sda? Is it still in /dev? has it been > kicked from the system? Or just the raid? It is still on the system, so I guess it's just kicked off the raid. > > Take a look at > https://raid.wiki.kernel.org/index.php/Linux_Raid#When_Things_Go_Wrogn > Especially the "asking for help" page. It gives you loads of diagnostics > to run. Ok, I already went through most of those tests, but still not sure what they are telling me. > Basically, we need to know whether sda has died, or whether it's a > problem with raid (especially with older mdadm, like I suspect you may > have, the problem could lie there). >> Anyhow, for example, I received an email: >> >> A DegradedArray event had been detected on md device /dev/md0. > Do you have a spare drive to replace sda? If you haven't, it might be an > idea to get one - especially if you think sda might have failed. In that > case, fixing the raid should be pretty easy. So long as fixing it > doesn't tip sdb over the edge ... The replacement drive is coming tomorrow. I'm certain now there's a major issue with the drive and will be replacing it. My intent is to basically follow these instructions for replacing the drive. sudo mdadm --remove /dev/md1 /dev/sda2 sudo mdadm --remove /dev/md0 /dev/sda1 Remove the bad drive, install new drive sudo mdadm --add /dev/md1 /dev/sda2 sudo mdadm --add /dev/md1 /dev/sda1 Would that be the correct approach? Finally could you tell me how to subscribe to this newsgroup through an NNTP client? I was using it through the gmane server, which seems to have issues of whether it's being continued or not. And although I can see some recent posts from last week, there has been nothing new. I've been searching for a NNTP server, but can't find one. Thanks!
