December 2002
Intermediate to advanced
260 pages
9h 18m
English
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Monitoring RAID Devices
Monitoring is an essential part of working with RAID. Since most arrays can survive only a single disk failure, it’s important to know when any failure occurs. That way, failed disks can be replaced before a second disk fails and causes data loss. The easiest way to monitor arrays is by modifying your existing scripts and monitoring platforms to look for information about the RAID subsystem in your system logs. You can look for keywords such as md, raid1, recovery, resyncing, raid5, raid0, linear, RAID, and superblock. It’s a good idea to take a look at the information that the RAID subsystem reports to syslog so that you can get a good idea of how to custom-tailor monitoring for your specific needs.
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