Using EMS HA Monitors

Chapter 2 51
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:
Figure 2-4 represents a node with two RAID arrays and two PV links to each are
Figure 2-4 RAID Array Example
/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.
node1
lun 0
lun1
lun 0
lun1
lun 0
lun1
/dev/dsk/c2t1d0
/dev/dsk/c2t1d1
/dev/dsk/c2t3d0
/dev/dsk/c2t3d1
lun 0
lun1
/dev/dsk/c1t0d0
/dev/dsk/c1t2d0
vgdance
vgsing
Bus A for vgdance:
Bus B for vgdance:
Bus B for vgsing:
Bus A (c1)
Bus B (c2)
t0
t2
t1
t3
/dev/dsk/c1t0d1
/dev/dsk/c1t2d1
Bus A for vgdsing: