3Ware 3W-6800 - Escalade 6800 RAID Controller, Руководство пользователя

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3ware Escalade Storage Switch User Guide
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AEN 024h AEN_SBUF_FAIL
The storage switch, as part of its data integrity features, performs
diagnostics on its internal RAM devices. Once a day, a non-destruc-
tive test is performed on the cache memory. Failure of the test indi-
cates a failure of a hardware component on the storage switch. This
AEN is sent to notify the user of the problem.
AEN 025h AEN_LOST_CACHED_WRITE
To improve performance, this storage switch features caching layer
firmware. For write commands this means that it acknowledges it
has completed a write operation before the data is committed to
disk. If the storage switch can not commit the data to the media
after it has acknowledged 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 multiple 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 storage switch command. The AEN may or may not be associ-
ated 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 particular drive. For redundant arrays, this typically means that
dynamic sector repair would be invoked (see AEN 023h). For non-
redundant arrays (JBOD, RAID0 and degraded arrays), drive ECC
errors result in the storage switch returning failed status to the asso-
ciated host command.
AEN 027h AEN_DCB_XSUM_ERROR
The storage switch 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 storage switch