HP A3550A - High Availability Disk Arrays Model 20 Storage Enclosure User Manual page 286

Note Filter(s) are active until deleted or until the disk array is powered down. If the
Unsolicited Event Log listing seems short, one or more filters may be active. Try
deleting all filters, as explained next.
To Delete All Filters of One Type
SP Event Codes
6-38 Unsolicited Event Log
R
ETURN