disk type for Metadata Event Logs

FAQ.md

@@ -23,6 +23,27 @@ The default volume size is 30GB, and default to 8 volumes. Very likely you would
 
 SeaweedFS also assumes there is a default disk type, which is either empty or `"hdd"`. If all your disk type is `"ssd"`, you should leave the disk type as empty since the disk type basically is just a tag to group the volumes.
 
+### Metadata Event Logs with All-SSD Clusters
+
+**Q: I am seeing errors or cannot find a disk type when writing metadata event logs on my all-SSD cluster. What should I do?**
+
+If your cluster consists entirely of SSDs (with no HDDs), you may encounter issues where the system fails to find a suitable disk type for writing metadata event logs. This happens because by default it is looking for a disk type as empty or hdd.
+
+**Solution:**
+In your configuration, simply leave all disk types empty. This is the recommended approach for homogenous clusters.
+
+2.  **Path-Specific Configuration:** If you cannot leave the disk types empty for any specific reason, you can enforce the disk type using the [path-specific filer configuration](https://github.com/seaweedfs/seaweedfs/wiki/Filer-Store-Replication#path-specific-filer-configuration).
+
+    Example using `weed shell` to configure the metadata log path:
+    ```bash
+    # Start the weed shell
+    weed shell
+    
+    # Configure the metadata event log path to use SSD (or another disk type)
+    # The default path for system logs is /topics/.system/log
+    fs.configure -locationPrefix=/topics/.system/log -disk=ssd -apply
+    ```
+
 ### How do I pre-allocate one or more volumes?
 
 To pre-allocate volumes, send a request to the Master server. For example: