![ubuntu marvell raid monitor ubuntu marvell raid monitor](https://www.zem.fr/wp-content/uploads/2015/06/arduino-password-box-back.png)
I then decided to search my init scripts to see what was installed by default and found /etc/init.d/mdadm. So, it turns out that my version of Ubuntu Server was already monitoring data integrity once a month. Steal it from your nearest Debian install, or from the mdadm source package. This command checks all data integrity.Įcho check > /sys/block/$array/md/sync_actionīut with a lot of sanity around it. The first Sunday of the month by default (see /etc/cron.d). usr/share/mdadm/checkarray –cron –all –quiet On Debian (and therefore Ubuntu) machines, cron runs: I searched some more and came across the following from ServerFault.
#Ubuntu marvell raid monitor how to
This was all great but now my dilemma was in deciding how to put this information to use. That’s RAID monitoring made easy.įinally, the –program or –alert parameters specify the program to be run whenever an event is detected. Finally, critical events and fatal errors should be e-mailed to the system manager. The delay parameter means that polling will be done in intervals of 1800 seconds. Should release a mdadm daemon to monitor /dev/md2. Also, follow mode can be used to trigger contingency commands if a disk fails, like giving a second chance to a failed disk by removing and reinserting it, so a non-fatal failure could be automatically solved. If needed, that will make mdadm send email alerts to the system administrator when arrays encounter errors or fail. You can run mdadm as a daemon by using the follow-monitor mode. This commands will show spare and failed disks loud and clear. That seemed like a good solution, but I had also heard about mdadm and wanted to investigate it too. Given this information you could write a script that polls /proc/mdstat searching for character sequence and then schedule this via cron. The order in which the devices appear in the /proc/mdstat output means nothing. Once the resync operation is complete, the device’s role numbers are swapped. The spare that replaces this device will be the device with the lowest role number n or higher that is not marked (F). 0,1.,n-1 are for the working array.Īlso, if you have a failure, the failed device will be marked with (F) after the. Any device with “n” or higher are spare disks.
![ubuntu marvell raid monitor ubuntu marvell raid monitor](https://i.stack.imgur.com/rf47x.png)
The raid role numbers following each device indicate its role, or function, within the raid set. The first number is the number of a complete raid device as defined. To identify the spare devices, first look for the value on a line. You can always take a look at /proc/mdstat. The first resource I found is from the Linux RAID wiki. If you are running Ubuntu Server skip to the bottom for some good news. I found a few resources and decided to compile them in one post. I’ve been searching for a way to reliably monitor a RAID array.