Using EMS HA Monitors

Chapter 2 33

Monitoring Disk Resources

Disk Monitor Reference

The EMS disk monitor reports information on the physical and logical volumes

conﬁgured by LVM (Logical Volume Manager). Anything not conﬁgured through

LVM is not monitored from the disk monitor. Monitored disk resources are:

• Physical volume summary (/vg/vgName/pv_summary), a summary status of all

physical volumes in a volume group.

• Physical volume and physical volume link status

(/vg/vgname/pv_pvlink/status/deviceName), the status of a given physical

volume or PV links in a volume group.

• Logical volume summary (/vg/vgName/lv_summary), a summary status of all

logical volumes in a volume group.

• Logical volume status (/vg/vgName/lv/status/lvName), the status of a given

logical volume in a volume group.

• Logical volume copies (/vg/vgName/lv/copies/lvName), the number of copies of

data available in a volume group.

Monitoring both the physical and logical volumes allows you to detect failures in

both active and inactive volume groups and logical volumes and correct hardware

problems that put node, application, or data availability at risk.

Figure 2-1 shows the class hierarchy for the disk monitor.

Items in boxes are resource instances that can be monitored.

Items in italics change depending on the names of volume groups, devices, and

logical volumes on the system.

Figure 2-1 Disk Monitor Resource Class Hierarchy

/pv_summary

/pv_pvlinks

/status

/deviceName

/lv/

/status

/copies

/lvName

/vg

/vgName

/lv_summary