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check_mdstat.sh
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# check_mdstat.sh
This script reads from `/proc/mdstat` to get the status of a RAID devices.
Other than [check_md_raid](https://exchange.icinga.com/exchange/check_md_raid) and [check_md_raid updated](https://exchange.icinga.com/jasem/check_md_raid updated/) not all RAIDs are checked simulataneously, but only one specific. This gives the possibility to query some "performance" data and later add more granular checks.
## Arguments
* --raid | -r: Name of the RAID, e.g. `md0`
* --input | -i: Input file. Defaults to /proc/mdstat
* --debug | -d: More debugging output, cannot be used with icinga2
## Results
* CRITICAL: if any device failed
* CRITICAL: if the state of the RAID is not active/started
* WARNING: when recoverying/resyncing
* CRITICAL: if the number of active devices is smaller than the number of active devices.
## Known issues
Probably I did not get things right with spare devices.