Dell POWERVAULT MD3600I - Manual (Page 218)

7. Monitor the progress and completion status of the download to the expansion enclosures. The progress and status
of each expansion enclosure that is participating in the download is displayed in the Status column of the Select
enclosures table.
NOTE: Each firmware download can take several minutes to complete.
8. Perform one of these actions depending on whether the download succeeded:
– The download succeeded — The statuses of all the expansion enclosures show Complete. You can close
the Download environmental (EMM) Card Firmware dialog by clicking Close. The expansion enclosure
EMM cards are now operating with the new firmware.
– The download failed — The status of one expansion enclosure shows Failed, and the remainder of the
expansion enclosures show Canceled. Make sure that the new firmware file is compatible before
attempting another firmware download.
Self-Monitoring Analysis And Reporting Technology (SMART)
Self-Monitoring Analysis and Reporting Technology (SMART) monitors the internal performance of all physical disk
components to detect faults indicating the potential for physical disk failure. SMART uses this information to report
whether failure is imminent so that a physical disk can be replaced before failure occurs. The RAID controller monitors
all attached drives and notifies users when a predicted failure is reported by a physical disk.
Media Errors And Unreadable Sectors
If the RAID controller detects a media error while accessing data from a physical disk that is a member of a disk group
with a redundant RAID level (RAID 1, RAID 5 or RAID 10), the controller tries to recover the data from peer disks in the
disk group and uses recovered data to correct the error. If the controller encounters an error while accessing a peer
disk, it is unable to recover the data and affected sectors are added to the unreadable sector log maintained by the
controller. Other conditions under which sectors are added to the unreadable sector log include:
• A media error is encountered when trying to access a physical disk that is a member of a nonredundant disk
group (RAID 0 or degraded RAID 1, RAID 5 or RAID 10).
• An error is encountered on source disks during rebuild.
NOTE: Data on an unreadable sector is no longer accessible.
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