Check if the below 6 steps help to create a new pattern for SNMP storage server.

1. Setup SNMP v3 credential in your storage server and copy same credentials in ServiceNow - discovery_credentials.
2. Run quick discovery on the IP, ServiceNow will stop after Classification because OOB does not have corresponding OID and Pattern.
3. Use SNMP - Classify ECC input entry to find the OID.
4. 1. Use https://www.convertjson.com/xml-to-json.htm and https://codebeautify.org/jsonviewer
5. Create SNMP classification entry in discovery_classy_snmp and discovery_snmp_oid.
6. 1.
7. Create a new pattern on the storage server on sn_discovery_patterns, refer to the attached datadomain.txt JSON. Or you can copy from the existing Storage related pattern. Copy only steps into the new pattern.
8. 1.
   
   1. Configure the trigger probes
      
   2. 
9. Make sure to add pattern to OSs - Pre Sensor in sa_pattern_prepost_script table so that it takes care of Manufacturer and model.