Avaya 03-300430 사용자 설명서

The HDD MO monitors the hard drive via the Self Monitoring, Analysis, and Reporting 
Technology (S.M.A.R.T) capability that is built into the hard disk drive unit. The integrated 
controller for the hard disk drive works with sensors incorporated in the hard drive to monitor the 
drive’s performance. The SMART technology makes status information concerning the disk 
drive available to monitoring software. 
The basic concept with SMART is that some hard disk drive problems do not occur suddenly. 
They are the result of a gradual degradation of disk components. For example, if the value for 
Reallocated Event Count (count of remap operations, both successful and non-successful) for 
Event ID 21 is going up it may indicate an impending disk failure. At the very least it should be 
monitored closely.

on page 69 describes the HDD Event IDs and their 

troubleshooting procedures.

19

WRN

Device: device_name, Failed attribute: attr_number
This message indicates that the attribute value has exceeded its threshold 
value. 

1. If posted, user very likely has a drive problem and should definitely 

consider replacing the drive.

20

WRN

smartd: Device: device_name, Read Smartd Values Failed
smartd: Device: device_name, Read Smartd Threshold Failed
This message indicates the SMART utility was unable to read the current 
SMART values or thresholds for the drive. This may result in SMART not 
executing and the values that are reported may be stale (or outdated). See 
also Event ID 22. 

21

WRN

smartd: Device: /dev/had, S.M.A.R.T. Attribute: attr_number Changed 
chng_value.
The value for the specified attribute number (attr_number) has changed by 
the specified value (chng_value). Posting of this alarm may/may not 
indicate possible drive problems.
Definitions for the attributes are:

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