Bug ID 441400: TMSTAT errors after removing disk drive from system

Last Modified: Jan 07, 2026

Affected Product(s):
BIG-IP LTM(all modules)

Fixed In:
11.6.0

Opened: Dec 20, 2013

Severity: 2-Critical

Symptoms

When a single disk drive in a raid array is physically removed from a running system, the following errors will be logged every 5secs until the system is rebooted: statsd[13166]: 011b0203:3: Error 'No such file or directory' opening file /sys/block/sda/stat err statsd[13166]: 011b0900:3: TMSTAT error max disk stat: read failed.

Impact

Log messages every 5 secs.

Conditions

Systems supporting RAID configurations

Workaround

None.

Fix Information

Properly detect disk removal and don't query stats for drives that have been removed.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips