某个驱动器发生故障时，系统控制台上将显示有关该驱动器以及包括该驱动器的 RAID 卷的错误消息。例如，系统控制台上显示以下消息表明卷 905 已因丢失 PhysDiskNum 1 而被降级：
Mar 16 16:28:26 hostname scsi: /pci@400/pci@2/pci@0/pci@e/scsi@0 (mpt_sas0): Mar 16 16:28:26 hostname PhysDiskNum 1 with DevHandle 0xc in slot 0 for enclosure with handle 0x0 is now offline Mar 16 16:28:26 hostname scsi: /pci@400/pci@2/pci@0/pci@e/scsi@0 (mpt_sas0): Mar 16 16:28:26 hostname PhysDiskNum 1 with DevHandle 0xc in slot 0 for enclosure with handle 0x0 is now , active, out of sync Mar 16 16:28:26 hostname scsi: WARNING: /pci@400/pci@2/pci@0/pci@e/scsi@0 (mpt_sas0): Mar 16 16:28:26 hostname Volume 905 is degraded Mar 16 16:28:26 hostname scsi: /pci@400/pci@2/pci@0/pci@e/scsi@0 (mpt_sas0): Mar 16 16:28:26 hostname Volume 0 is now degraded Mar 16 16:28:26 hostname scsi: WARNING: /pci@400/pci@2/pci@0/pci@e/scsi@0 (mpt_sas0): Mar 16 16:28:26 hostname Volume 905 is degraded