Checking Available Spare Disks

To avoid any loss of critical data, it is essential for a filer to always maintain a pool of spare disks that can replace the faulty disk when a disk failure occurs. A filer without any left spare disk will not be able to keep the level of data safety and performance in case of a disk failure.

The SpareDiskCount parameter reports the number of spare disks available for each filer monitored with the solution. By default, a warning is triggered when no spare disk is available (SpareDiskCount is set to zero).

Verifying the Number of Available Spare Disks in your NetApp Filer

1.	Create a PATROL Query in the PATROL Console to show the value of the SpareDiskCount parameter.

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: Available Spare Disks)

▪	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_SpareDisks_NewQuery

PATROL Query – General Tab

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

•	SEN_NAP_7_STORAGESYSTEM if you are in 7-Mode.

•	SEN_NAP_C_CLUSTER if you are in C-Mode.

USECASE_SpareDisks_ApplicationClassTab

PATROL Query – Application Class Tab

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

USECASE_SpareDisks_ParameterTab

PATROL Query – Parameter Tab

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