Checking Disks Health

Manufacturers use the “mean time to failure” or MTTF to indicate the operational reliability of their products. But the advertised MTTF of 1,000,000 hours is misleading. Recent studies show that the average annual replacement rate for hard disks is typically between 3% and 15%. Because a disk failure can result in loss of data, unavailability and performance degradation, it is highly recommended to monitor disks health.

To check disks health:

1.	Create a PATROL Query in the PATROL Console to show the value of the Status parameter of the SEN_NAP_7\|SEN_NAP_C_DISK application class.

2.	Open PATROL Central Operator Taskpad.

3.	In the Action menu of the PATROL console, click New Query.

4.	In the General tab:

▪	Enter the Query Name (example: Disks Health)

▪	Enter the Query Description (optional)

▪	In the Query Results Filter section, select Show Selected Objects and check the Parameters box

▪	In the Additional Filtering section, select the Enable Application Class level filtering and the Enable Parameter level filtering options

USECASE_DisksHealth_NewQuery

PATROL Query – General Tab

5.	Open the Application Class tab. In the Pattern Matching section, select Like and type:

•	SEN_NAP_7_DISK if you are in 7-Mode.

•	SEN_NAP_C_DISK if you are in C-Mode.

USECASE_DisksHealth_ApplicationClassTab

PATROL Query – Application Class Tab

6.	Open the Parameter tab. In the Pattern Matching section, select Like and type Status.

USECASE_DisksHealth_ParameterTab

PATROL Query – Parameter Tab

7.	Click OK to display the results of the query.

USECASE_DisksHealth_Results

PATROL Query – Results

8.	Check that the disks status is not degraded or failed.

9.	In case a replacement is required, you will find all the information required (vendor name, model, etc.) in the Disk Infobox:

InfoBox_Disk

Disk InfoBox