DASD Attributes

The DASD attribute group monitors sysplex-wide activity of groups of DASD devices.


Average Device Contention Index Average of the device level contention indexes for devices of the group. Device contention is an indicator of I/O delay for this group, caused by intersystem contention for the device. The larger the number, the more severe is the contention. Valid value is a numeric value in the range 0 through 2147483647, to two decimal point precision, and includes the use of the *AVG, *MAX, *MIN, or *SUM functions. An example is 1.25.

Average True Percent Busy Average of true busy calculated for devices in the group. True percent busy is a measure of the busy time accumulated for the group by all systems in the Sysplex. Valid value is a numeric value in the range 0.0 through 100.0, to one decimal point precision, and includes the use of the *AVG, *MAX, *MIN, or *SUM functions. An example is 12.5.

Bypass Filtering This attribute is for information only. You can use this attribute in a situation.

Group Name Name of the DASD group. Valid format is a simple text string from 1 through 30 characters; for example, SGDB2X.

Highest Device Contention Index Highest of the device-level contention indexes for devices of the group. Valid value is a numeric value in the range 0 through 2147483647, to two decimal point precision, and includes the use of the *AVG, *MAX, *MIN, or *SUM functions. An example is 4.25.

Highest Device Contention Index Volser Volume serial number of the device contributing the largest device contention index. Valid format is a simple text string from 1 through 6 characters; for example, VOL001.

Highest True Percent Busy Largest true busy for a device in the group. Valid value is a numeric value in the range 0.0 through 100.0, to one decimal point precision, and includes the use of the *AVG, *MAX, *MIN, or *SUM functions. An example is 25.5.

Highest True Percent Busy Volser Volume serial number of the device contributing the largest true busy. Valid format is a simple text string from 1 through 6 characters; for example, VOL001.

Managed System A sysplex in your enterprise that is being monitored by OMEGAMON XE for z/OS agents. Valid value is a character string with a maximum length of 32 bytes, in the format <plexname>:MVS:SYSPLEX.

Volume Serial Number The volume serial number. The valid format is a simple text string with 1 through 6 characters,  for example, VOL001