Rule for harddisks
Create custom rule for monitoring the fill level of disks and mountpoints

By default, your account comes with some default rules for the disk monitoring that are based on the percentage fill level. If you need a rule based on the absolute number of bytes free or used, proceed as follows.
  1. 1.
    Create a new rule.
  2. 2.
    Select Host = Is any or tie the rule to a specific host.
  3. 3.
    Select Type = Agent check.
  4. 4.
    Select "Or manually specify check key" and enter fs.free_B.* as key. This applies to all disks of a host. You can use fs.free_B./ do apply the rule only to the Linux root file system, or fs.free_B.C: to tie the rule to a single Windows drive letter.
  5. 5.
    Select the threshold
  6. 6.
    Select the action
Rule based on the absolute fill level of any disk
Alert based on absolute disk fill level
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