Reseating a faulty IOM12 has not resolved this issue Disk Shelf cannot recognize one IOM Module. IOM Module LED is not bright. Module type: IOM12; monitoring is active Shelf status: critical condition...Reseating a faulty IOM12 has not resolved this issue Disk Shelf cannot recognize one IOM Module. IOM Module LED is not bright. Module type: IOM12; monitoring is active Shelf status: critical condition Element Status Status Bytes Status Descriptions Shelf 0: DS212-12 Firmware rev. Shelf XXX: DS212-12 Firmware rev. Shelf 11: DS212-12 Firmware rev. Shelf 12: DS212-12 Firmware rev. IOM12 A: 0220 IOM12 B: 0220 Reseat or replace Shelf XXX IOM12 B module has not resolved this issue.