210 Management: Firmware Downloads
• 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 non-redundant 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.
book.book Page 210 Saturday, September 24, 2011 9:06 AM
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