The disk monitoring options allow you to specify the area size in sectors for both families and disk units. This lets the interface software report on usable sectors, rather than available sectors. The usable area size is application dependent and varies between families. You can now specify what is usable for each family or disk unit.
The following example shows the option AREASIZE followed by an integer giving the number of sectors in the area size of interest.
STARTDISKNAMES. disk-family [(index)] [threshold-% [severity]] [AREASIZE area-size]. . . ENDDISKNAMES.
Operations Sentinel Interface reports this information by sending a text message to each of the connected Operations Sentinel servers. These messages are described in Section 6 of the Operations Sentinel for ClearPath MCP Installation and Configuration Guide. The format depends on whether or not the disk family or disk unit has a threshold specified.
If the specification of disk monitoring parameters includes AREASIZE, the interface softwre includes AREASIZE information on the messages sent to Operations Sentinel. The MCPMon database in Operations Sentinel level 9.0 matches messages both with and without this AREASIZE information. The updated database is also available in PLE 18149711 under Products SP-OPERATION.
Area Size in Sectors for Thresholds
You can optionally specify the area size in sectors for both families and packs. The following apply to the example.
In the first two lines, 13 and 10 are percentages of total available space on the entire disk family. Since the area size is not specified, the default is one sector.
In the third and fourth lines, 250000 is the number of sectors in the area. The line DMSPACK 13 WARNING 250000 says to raise a WARNING alarm when less than 13 percent of the available space on the family is in areas of 250000 sectors or more.
In the last line, (1) is the family index. This will raise a warning alarm when 10percent or less of the space on family index 1 of family A_Base_Pack is made up of areas of size 2000 or more.
Example
STARTDISKNAMES DISKFAMILY 13 WARNING DISKFAMILY 10 MAJOR DMSPACK 13 WARNING AREASIZE 250000 DMSPACK 10 MAJOR AREASIZE 250000 A_Base_Pack (1) 10 WARNING AREASIZE 2000 ENDDISKNAMES.
Area sizes can vary from one line to the next. There is no requirement for them to be the same across families or even within a family. However, you can only specify one area size for each severity level for any given family or pack.
Area Size in Sectors for Availability Reporting
For the periodic availability messages, use AREASIZE to define the usable option on the family or pack definition. In the following apply to the example.
AREASIZE 1200 is specified, so the periodic availability message reports are based on the MCP Disk Dutilization (DU) data, with an area size of 1200.
If AREASIZE is not specified, the agent uses sector size 1.
Example
DISK AREASIZE 1200
A similar enhancement applies to monitoring individual packs.