Disk latency high
Disk's average read or write latency exceeds the threshold under non-trivial IOPS load. Indicates a struggling drive, saturated I/O queue, in-progress RAID rebuild, or noisy-neighbor workload.
Remediation
When this rule fires on one of your servers, the dashboard alert detail page renders the full remediation guidance: the command to run, what to verify after, and Furnace's annotation for your specific distro + hardware. Sign in at app.glassmkr.com to see the live alert.