3Ware 9550SXU-12 User Guide - Page 288

Troubleshooting 0026 Drive ECC error reported Event Type Error Cause Drive ECC errors are an indication of grown defects on a particular drive. For redundant units, this typically means that dynamic sector repair has been invoked (see message "0023 Sector repair completed" on page 274). For nonredundant units (Single Disk, RAID 0 and degraded units), which do not have another copy of the data, drive ECC errors result in the 3ware RAID controller returning failed status to the associated host command. Action Schedule periodic verifications of all units so that drive ECC errors can be found and corrected. If the unit is non-redundant a unit file system check is recommended. Under Windows, right-click on your drive icon and choose Properties> Tools> Check Now. Under Linux or FreeBSD use fsck /dev/sda1. If you have more than one SATA device, substitute the correct drive letter and partition number, such as sdb2, for sda1. See Also "Enabling or Disabling Auto Verify for a Unit" on page 120 "Scheduling Background Tasks" on page 173 0027 DCB checksum error detected Event Type Error Cause The drive's Drive Configuration Block (DCB) has been corrupted. The 3ware RAID controller stores certain configuration parameters on a reserved area of each disk drive called the Drive Configuration Block. As part of power-on initialization, the 3ware RAID controller performs a checksum of the DCB area to ensure consistency. 276 3ware SAS/SATA RAID Software User Guide, Version 9.5.1