SMART Errors?????

[Alexander Syring <alex@asyring.homeip.net>]

Hi 
beim durchblättern der syslog ist mir das aufgefallen

May  9 20:48:30 localhost smartd[4370]: Device: /dev/twe0 [3ware_disk_01], 
SMART Usage Attribute: 199 UDMA_CRC_Error_Count changed from 188 to 1
May  9 20:48:30 localhost smartd[4370]: Device: /dev/twe0 [3ware_disk_02], 
SMART Prefailure Attribute: 8 Seek_Time_Performance changed from 249 to 250
May  9 20:48:30 localhost smartd[4370]: Device: /dev/twe0 [3ware_disk_02], 
SMART Usage Attribute: 199 UDMA_CRC_Error_Count changed from 1 to 176
May  9 20:48:30 localhost smartd[4370]: Device: /dev/twe0 [3ware_disk_03], 
SMART Prefailure Attribute: 8 Seek_Time_Performance changed from 249 to 250
May  9 20:48:30 localhost smartd[4370]: Device: /dev/twe0 [3ware_disk_03], 
SMART Usage Attribute: 199 UDMA_CRC_Error_Count changed from 173 to 190
May  9 20:48:31 localhost smartd[4370]: Device: /dev/twe0 [3ware_disk_04], 
SMART Prefailure Attribute: 8 Seek_Time_Performance changed from 249 to 250
May  9 20:48:31 localhost smartd[4370]: Device: /dev/twe0 [3ware_disk_04], 
SMART Usage Attribute: 199 UDMA_CRC_Error_Count changed from 186 to 181

kann mir einer verraten was die einzelnen sachen zu bedeuten haben?

bzw was bedeutet "SMART Usage" und was "SMART Prefailure"

Viele Grüße 
Alex