3Ware 8006-2LP - Escalade RAID Controller, Manual

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Screen display messages
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AEN 024h AEN_SBUF_FAIL
The ATA RAID controller, as part of its data integrity features, performs diag-
nostics on its internal RAM devices. Once a day, a non-destructive test is per-
formed on the cache memory. Failure of the test indicates a failure of a
hardware component on the ATA RAID controller. This AEN is sent to notify
the user of the problem.
AEN 025h AEN_LOST_CACHED_WRITE
To improve performance, this ATA RAID controller features caching layer
firmware. For write commands this means that it acknowledges it has com-
pleted a write operation before the data is committed to disk. If the ATA
RAID controller can not commit the data to the media after it has acknowl-
edged to the host, this AEN is posted to the user.
Typically, the LOST CACHED WRITE notification would be an indication of
a catastrophic failure of the drives in the array, such as loss of power to multi-
ple drives in an array.
AEN 026h AEN_DRIVE_ECC_ERROR
This AEN may be sent when a drive returns the ECC error response to a ATA
RAID controller command. The AEN may or may not be associated with a
host command. Internal operations such as Background Media Scan post this
AEN whenever drive ECC errors are detected.
Drive ECC errors are an indication of a problem with grown defects on a par-
ticular drive. For redundant arrays, this typically means that dynamic sector
repair would be invoked (see AEN 023h). For non-redundant arrays (JBOD,
RAID 0 and degraded arrays), drive ECC errors result in the ATA RAID con-
troller returning failed status to the associated host command.
AEN 027h AEN_DCB_XSUM_ERROR
The ATA RAID controller stores certain configuration parameters on a
reserved area of each disk drive called the Drive Configuration Block (DCB).
As part of power-on initialization, the ATA RAID controller performs a
checksum of the DCB area to ensure consistency. If an error occurs, please
contact 3ware technical support. The drive’s DCB has been corrupted.
AEN 028h AEN_DCB_BAD_VERSION
During the evolution of the Escalade product line, the format of the DCB has
been changed to accommodate new features. The DCB format expected by
the ATA RAID controller and the DCB that is written on the drive must be
compatible. If an array that was created on a very old Escalade product is con-
nected to a newer Escalade ATA RAID controller, this AEN is posted and the
ATA RAID controller rejects the drive. Please contact 3ware technical support
if this event occurs.