My Exchange 2013 (CU7) servers are logging warning approx. every hour regarding the free available disk space on the Mailbox database volumes in the

Application and Services | Microsoft | Exchange | Managed Availability | Monitoring crimson channel in the eventlog. The threshold for this is set to 175GB, and especially for lab environment this can be too low.

The following event is logged:

Log Name: Microsoft-Exchange-ManagedAvailability/Monitoring
Source: Microsoft-Exchange-ManagedAvailability
Date: 1/22/2015 12:07:46 PM
Event ID: 4
Task Category: Monitoring
Level: Error
Keywords:
User: SYSTEM
Computer: EXCH01.contoso.com
Description:
Database ‘MDB02’ is low on log volume space. ‘MDB02’ is low on log volume space [F:\]. Current=86,97 GB, Threshold=175,78 GB Continue reading Database MDB02 is low on log volume space →