Monitoring Disk Resources

Creating Disk Monitoring Requests

Resources to Monitor for RAID Arrays

These considerations are relevant to all supported RAID configurations listed at the beginning of this chapter. To adequately monitor a RAID system, create requests to monitor at least the following resources for all volume groups on a node:

/vg/vgName/pv_summary

This gives you an overview of the status of the entire physical volume

 

 

group and is recommended when using EMS in conjunction with

 

 

MC/ServiceGuard; see “Rules for Using the EMS Disk Monitor with

 

 

MC/ServiceGuard” on page 40.

vg/vgName/pv_pvlink/status/*

This gives you the status of each PV link in the array and is redundant

 

 

to pv_summary. It is recommended when using EMS outside of the

 

 

MC/ServiceGuard environment, or if you require specific status on

 

 

each physical device.

vg/vgName/lv_summary

This gives you the status of data availability on the array.

 

Figure 2-4 represents a node with two RAID arrays and two PV links to each are

Figure 2-4

RAID Array Example

Bus A for vgdance: /dev/dsk/c1t0d0 /dev/dsk/c1t2d0

Bus A for vgdsing: /dev/dsk/c1t0d1 /dev/dsk/c1t2d1

t0

vgdance

 

 

 

 

 

 

 

 

Bus B for vgdance:

 

 

 

 

node1

 

 

/dev/dsk/c2t1d0

 

 

 

 

 

 

 

 

 

/dev/dsk/c2t3d0

 

 

 

 

 

 

 

 

 

Bus B for vgsing:

 

Bus A (c1)

 

 

Bus B (c2)

 

 

 

/dev/dsk/c2t1d1

 

 

 

 

 

 

 

 

 

/dev/dsk/c2t3d1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t1

 

 

 

 

 

 

 

 

 

 

 

 

t2

 

 

t3

 

 

 

 

 

 

 

 

 

 

 

 

lun 0

lun 0

lun 0

lun 0

 

 

vgsing

 

 

 

lun1

lun1

lun1

lun1

Chapter 2

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HP HA s Software manual Resources to Monitor for RAID Arrays, RAID Array Example