Werk #18976: Windows Agent supports new lines and tabs in volume names

Component

Checks & agents

Title

Windows Agent supports new lines and tabs in volume names

Date

Jan 8, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.6.0b1 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.5.0b1 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.4.0p19	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0p42	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

The Windows agent replaces spaces, tabs, carriage returns, and newlines in volume names with underscores to prevent corruption in the df section output.

Previously, volume names containing tabs, carriage returns, or newlines caused parsing issues.

With this fix, filesystem monitoring is more reliable, and the Checkmk site correctly parses all volume labels containing these special characters.

To apply this fix, update the Checkmk agent on all monitored Windows hosts to the latest agent version.

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