Problem Information
Item | Description |
Storage type | Enterprise storage |
Product version | 2100 V3;2200 V3;2600 V3;2800 V3;5300 V3;5500 V3;5600 V3;5800 V3;6800 V3;18500 V3;18800 V3 |
Fault type | Basic service |
Key word | Alarm Threshold; Smaller Than |
Question
Why is a capacity alarm not cleared after the used capacity of a storage pool becomes smaller than the alarm threshold? For example, if the alarm threshold is 80% and the capacity actually used drops to 79.4%, why does a capacity alarm still exist?
Answer
Cause
The system has an anti-jitter mechanism for the storage pool capacity alarm. The system uses 1% of the total capacity as the anti-jitter range. A capacity alarm is cleared only after the storage pool capacity becomes smaller than alarm threshold plus the anti-jitter range. For example, if the default capacity alarm threshold is 80%, an alarm is generated once the capacity actually used is greater than or equal to 80%. When the capacity actually used becomes lower than 79%, the capacity alarm is cleared.
Solutions
1. Expand the storage pool capacity. If the alarm persists, see solution 3.
2. If you do not want to expand the storage pool capacity, you can increase the alarm threshold to a maximum value of 85%.
3. Contact Huawei technical support.
A capacity alarm is reported only for storage pools that have thin LUNs or thin file systems.
Applicable Versions
OceanStor V3 V300R001SPC200 and later
OceanStor V3 V300R002
OceanStor V3 V300R003
