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Monitoring Software RAID1 with mdadm - David Biers

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Monitoring Software RAID1 with mdadm - David Biers David Biers Configuration Architecture Security Customization Command Line Scripting Helpful Tricks Notes Subscribe Home David Biers The only one that seems to be having fun. Configuration Architecture Security Customization Command Line Scripting Helpful Tricks Notes Subscribe Architecture / Command Line / Configuration 1 Monitoring Software RAID1 with mdadm by David · January 31, 2016 Don't die on me! So you've created your RAID1 with two drives using mdadm.  Now, you need to monitor it.  How? With mdadm, of course! Run the pursuit and transpiration the obvious to your own email address. [root@localhost ~]# mdadm --monitor /dev/md1 --mail=your.email@address.com -f -t This will moreover send a test email message with the arrays current status. Test the notification with a degraded variety The fun part. Let's mark one of the disks as stuff bad and remove it from the array. [root@localhost ~]# mdadm --manage /dev/md1 --fail /dev/sdc1 mdadm: set /dev/sdc1 faulty in /dev/md1 You should receive an email with something similar to the following: This is an automatically generated mail message from mdadm running on localhost.localdomain A Fail event had been detected on md device /dev/md1. It could be related to component device /dev/sdc1. Faithfully yours, etc. P.S. The /proc/mdstat file currently contains the following: Personalities : [raid1] md1 : zippy raid1 sdc1[2](F) sdb1[0] 8381760 blocks super 1.2 [2/1] [U_] From here, you can investigate and replace or repair as needed. "Undo" your test and re-add /dev/sdc1 to the RAID You will first have to remove the momentum from the array: [root@localhost ~]# mdadm --manage /dev/md1 --remove /dev/sdc1 mdadm: hot removed /dev/sdc1 from /dev/md1 Then, re-add it. [root@localhost ~]# mdadm --manage /dev/md1 --add /dev/sdc1 mdadm: widow /dev/sdc1 Courtesy of /proc/mdstat, you will see the RAID recovering: [root@localhost ~]# cat /proc/mdstat Personalities : [raid1] md1 : zippy raid1 sdc1[2] sdb1[0] 8381760 blocks super 1.2 [2/1] [U_] [===============>.....] recovery = 76.3% (6402048/8381760) finish=0.1min speed=200064K/sec unused devices: Tags: mdadmraid1software You may moreover like... 0 Why does my linux server marching so slow? (systemd) August 26, 2016 1 Automated MySQL Database Dumps Script March 13, 2013 1 Finding Large Files in Linux August 20, 2012 1 Response Comments0 Pingbacks1 Create Software RAID1 with mdadm (Part 1) - David Biers January 31, 2016 […] Let's move on to monitoring the RAID array. […] Leave a Reply Cancel reply Your email write will not be published. Required fields are marked *Comment Name * Email * Website 4  ×   =  16 Follow: Next story IPFire Site-to-Site VPN (OpenVPN) with Edgerouter-X EdgeOS / Vyatta Previous story Create Software RAID1 with mdadm (Part 1) Find Something? Hosted At.. SpamObstructed110,727 spam obstructed by Akismet Common Tagsadding spare software triggerman Bash chmod cli collectd connections tenancy panels corrections cpanel custom repo data databases escalate file systems Firewall forwarding game Games grafana hack nonflexible momentum httpd influxdb mdadm mysql networking Notes owner permissions plesk raid1 repositories root rpmforge scan Script security software ssh Steam tricks vpn vyatta Configuration Architecture Security Customization Command Line Scripting Helpful Tricks Notes Subscribe David Biers © 2018. All Rights Reserved.