3Ware 9500S-12MI User Guide - Page 174

Aen 00ch Aen_init_started, Aen 021h Aen_udma_downgrade, Aen 023h Aen_sector_repair

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Troubleshooting: Problems and Solutions AEN 00Ch AEN_INIT_STARTED The 3ware RAID controller notifies the user by this AEN whenever it starts an initialization. Initialization either occurs at array creation time for larger RAID 5 or 50 arrays or later during the initial verification of redundant arrays. AEN 00Eh AEN_INIT_FAILED The 3ware RAID controller was unable to complete the initialization. This error can be caused by unrecoverable drive errors. When this error occurs, the unit will go back to degraded mode if possible. AEN 00Fh AEN_SMART_FAIL The 3ware RAID controller supports SMART Monitoring, whereby the individual drives automatically monitor certain parametric information such as error rates and retry counts. By monitoring this data, SMART may be able to predict a drive failure before it happens, allowing a user to schedule service of the array before it becomes degraded. The SMART status of each drive attached to the 3ware RAID controller is monitored daily. If a failure of any drive is determined to be likely, the user is notified by this AEN. AEN 021h AEN_UDMA_DOWNGRADE The 3ware RAID controller communicates to the ATA disk drives through the Ultra DMA (UDMA) protocol. This protocol ensures data integrity across the ATA cable by appending a Cyclical Redundancy Check (CRC) for all ATA data that is transferred. If the data becomes corrupted between the drive and the 3ware RAID controller (e.g., an intermittent cable connection) the 3ware RAID controller detects this as a UDMA CRC or cable error. The 3ware RAID controller then retries the failed command three times at the current UDMA transfer rate. If the error persists, it lowers the UDMA transfer rate (e.g., from UDMA 100 to UDMA 66) and retries another three times. This AEN is sent to the user when the 3ware RAID controller lowers the UDMA transfer rate. Possible causes of UDMA CRC errors are intermittent or bad ATA interface cables or cable routing problems through electrically noisy environments (e.g., cables are too close to the power supply). AEN 022h AEN_UDMA_UPGRADE During the self-test, if a drive is found to not be in the optimal UDMA mode, the controller will upgrade its UDMA mode to be optimal. AEN 023h AEN_SECTOR_REPAIR The 3ware RAID controller supports a feature called dynamic sector repair to allow the unit to recover from certain drive errors that would normally result 168 3ware 9000 Series Serial ATA RAID Controller User Guide

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Troubleshooting: Problems and Solutions
168
3ware 9000 Series Serial ATA RAID Controller User Guide
AEN 00Ch AEN_INIT_STARTED
The 3ware RAID controller notifies the user by this AEN whenever it starts
an initialization. Initialization either occurs at array creation time for larger
RAID 5 or 50 arrays or later during the initial verification of redundant arrays.
AEN 00Eh AEN_INIT_FAILED
The 3ware RAID controller was unable to complete the initialization. This
error can be caused by unrecoverable drive errors. When this error occurs, the
unit will go back to degraded mode if possible.
AEN 00Fh AEN_SMART_FAIL
The 3ware RAID controller supports SMART Monitoring, whereby the
individual drives automatically monitor certain parametric information such
as error rates and retry counts. By monitoring this data, SMART may be able
to predict a drive failure before it happens, allowing a user to schedule service
of the array before it becomes degraded. The SMART status of each drive
attached to the 3ware RAID controller is monitored daily. If a failure of any
drive is determined to be likely, the user is notified by this AEN.
AEN 021h AEN_UDMA_DOWNGRADE
The 3ware RAID controller communicates to the ATA disk drives through the
Ultra DMA (UDMA) protocol. This protocol ensures data integrity across the
ATA cable by appending a Cyclical Redundancy Check (CRC) for all ATA
data that is transferred. If the data becomes corrupted between the drive and
the 3ware RAID controller (e.g., an intermittent cable connection) the 3ware
RAID controller detects this as a UDMA CRC or cable error. The 3ware
RAID controller then retries the failed command three times at the current
UDMA transfer rate. If the error persists, it lowers the UDMA transfer rate
(e.g., from UDMA 100 to UDMA 66) and retries another three times. This
AEN is sent to the user when the 3ware RAID controller lowers the UDMA
transfer rate.
Possible causes of UDMA CRC errors are intermittent or bad ATA interface
cables or cable routing problems through electrically noisy environments
(e.g., cables are too close to the power supply).
AEN 022h AEN_UDMA_UPGRADE
During the self-test, if a drive is found to not be in the optimal UDMA mode,
the controller will upgrade its UDMA mode to be optimal.
AEN 023h AEN_SECTOR_REPAIR
The 3ware RAID controller supports a feature called dynamic sector repair to
allow the unit to recover from certain drive errors that would normally result