HWM Notification on Clariion CX 4

If you have ProSphere or Watch4Net in the environment, you can scrape these events and send notifications.

If you don't, you can look at the Event Monitoring template and ensure the email addresses you need notified are listed.  This also means you'll get emails for all of the other events checked.  Let us know if that helps!

Karl

Hello Karl,

are you sure that an notification, for reaching the High Water Mark will be send, if there is an notification Template for the eventcode 0x07c2? Can you tell me whether it is the correct code?

This is the only description of the Event Code i have found:

0x07C2      Write Cache Enable Pending. Not enough cache pages available.

Greetings

Johannes

What you are trying to monitor is actually the Dirty Pages % metric.  So you'd need to have a way to monitor the current value of Dirty Pages % on each SP, compare that value with the configured HWM, and then alert when you are above that value.  The in-built notifications in VNX do not have a way to monitor for this and the event code mentioned is not monitoring the cache dirty pages, it's monitoring the array's ability to enable the write cache in general.  Assuming the array is operating normally, the cache is already enabled.

A do it yourself approach would entail scripting a set of naviseccli commands to query the dirty pages and hwm values every so often, compare the two, and then email if the dirty pages is higher than HWM.  This would be relatively simple to script.

For more formal tools, EMC has a few options..

VNX Monitoring and Reporting (which is a scaled down version of Watch4Net, now EMC SRM) has alerting functionality that can email or send an SNMP trap based on a number of metrics including..
LUN Response Time
Storage Pool % Subscribed
SP Dirty Pages %
SP Processor Utilization %
VNX M&R has a license cost, but you can download it from Support and run it under the built in trial license for a month or so to test it out.  https://support.emc.com/products/28885_VNX-Monitoring-&-Reporting
VNX M&R installs on Windows or Linux and uses Naviseccli to communicate with the VNX array.

If you have the full EMC SRM or EMC Watch4Net product you can obviously do the same monitoring in addition to much more.

VNX Storage Analytics (which is either an OEM version of VMware vCops for just monitoring EMC storage, or an adapter for an existing VMware vCops instance to monitor EMC storage) also has dirty pages metrics, heat maps, topology views and alerting capability.  It also requires a license key unfortunately but it pretty powerful if you are running VMware workloads on the storage array you are trying to monitor.

One more thing I should mention..  If you have Microsoft SCOM, you can try to use the EMC Storage Integrator for Windows which has a ton of functionality, but I don't know for sure if Dirty pages is one of the monitored metrics.  ESI is a free download though so you can try it out and if it works for you, keep it.

Download from support..