3Ware 9550SXU-16ML User Guide - Page 232

h Drive ECC error reported, 027h DCB checksum error detected, 028h DCB version unsupported

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Chapter 11. Troubleshooting 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. 026h Drive ECC error reported This AEN may be sent when a drive returns the ECC error response to an 3ware 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 particular 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 3ware RAID controller returning failed status to the associated host command. 027h DCB checksum error detected The 3ware 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 3ware 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. 028h DCB version unsupported During the evolution of the 3ware product line, the format of the DCB has been changed to accommodate new features. The DCB format expected by the 3ware RAID controller and the DCB that is written on the drive must be compatible. If an array that was created on a very old 3ware product is connected to a newer 3ware RAID controller, this AEN is posted and the 3ware RAID controller rejects the drive. Please contact 3ware technical support if this event occurs. 029h Verify started The 3ware RAID controller allows the user to verify data integrity on an array.The verification functions for different RAID levels are as follows: „ Single, JBOD, and Spare. Verify = Media Scan „ RAID 0. Verify = Media Scan „ RAID 1. Verify = Compare of Mirror Sides „ RAID 10. Verify = Compare of Mirror Sides „ RAID 5 and 50. Verify = Compare of Parity Data with User Data When the verification starts, this AEN is posted to the user. 222 3ware 9550SX Serial ATA RAID Controller User Guide

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Chapter 11. Troubleshooting
222
3ware 9550SX Serial ATA RAID Controller User Guide
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.
026h Drive ECC error reported
This AEN may be sent when a drive returns the ECC error response to an
3ware 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
particular 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 3ware
RAID controller returning failed status to the associated host command.
027h DCB checksum error detected
The 3ware 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 3ware 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.
028h DCB version unsupported
During the evolution of the 3ware product line, the format of the DCB has
been changed to accommodate new features. The DCB format expected by
the 3ware RAID controller and the DCB that is written on the drive must be
compatible. If an array that was created on a very old 3ware product is
connected to a newer 3ware RAID controller, this AEN is posted and the
3ware RAID controller rejects the drive. Please contact 3ware technical
support if this event occurs.
029h Verify started
The 3ware RAID controller allows the user to verify data integrity on an
array.The verification functions for different RAID levels are as follows:
Single, JBOD, and Spare. Verify = Media Scan
RAID 0. Verify = Media Scan
RAID 1. Verify = Compare of Mirror Sides
RAID 10. Verify = Compare of Mirror Sides
RAID 5 and 50. Verify = Compare of Parity Data with User Data
When the verification starts, this AEN is posted to the user.