Dell VNX1 Storage Analytics 2.1 Installation and User Guide - Page 83

Frequently Asked Questions for VNX, nas/sbin/model

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Troubleshooting Frequently Asked Questions for VNX Which VNX arrays does EMC Storage Analytics support? It supports first- and second-generation VNX platforms. Support for CX4 covers CX4-120, CX4-240, CX4-480, and CX4-960 platforms. Supported NS series includes NS120, NS240, and NS960 platforms. A complete list of the supported models in each of these series is available in Installation requirements on page 16. Will EMC Storage Analytics continue to collect VNX statistics if the primary SP or CS goes down? Storage Analytics will continue to collect statistics through the secondary Storage Processor if the primary Storage Processor goes down. EMC Storage Analytics will automatically collect metrics from the secondary Control Station in the event of a Control Station failover. Note that the credentials on the secondary Control Station must match the credentials on the primary Control Station Does the Unisphere Analyzer for VNX need to be running to collect metrics? No. VNX Block metrics are gathered through naviseccli commands and VNX File metrics are gathered through CLI commands. However, statistics logging must be enabled on each storage processor (SP) on VNX Block, and statistics logging will have a performance impact on the array. No additional services are required for VNX File. How does the FAST Cache heatmap work? The FAST Cache heatmaps are based on the FAST Cache read and write hit ratios. This heatmap will turn red if these ratios are low because that indicates that FAST Cache is not being utilized efficiently. These heatmaps will turn green when FAST Cache is servicing a high percentage of I/O. I purchased a license for the model of the VNX array that I plan to monitor. When I configure the adapter instance for VNX File, why does an "invalid license" error message appear? Control Station may not be reporting the correct model or the array. Log into Control Station and check the array model with the command: /nas/sbin/model. Verify that the array model returned matches the model on the Right to Use certificate. After a Control Station failover, why is the VNX File adapter instance marked down and why does metric collection stop? The failover may have been successful, but the new Control Station may not be reporting the correct model of the array. This results in a failure to validate the license and all data collection stops. Log into Control Station and check the array model with the command: /nas/sbin/model. If the model returned does not match the actual model of the array, Primus case emc261291 in the EMC Knowledgebase provides possible solutions. The disk utilization metric is not visible for my VNX Block array. Why not? The disk utilization metric is not supported on VNX arrays running a VNX Block OE earlier than Release 32. Upgrade to VNX Block OE Release 32 or later to see this metric in vCenter Operations Manager. I am unable to successfully configure an EMC Adapter instance for VNX File when using a user with read-only privileges. Why does this happen? A user with administrative privileges is required while configuring an EMC Adapter instance for VNX File arrays running an OE earlier than 7.1.56.2. Upgrade to VNX File OE 7.1.56.2 or later to be able to configure an adapter instance using a user with read-only privileges. Frequently Asked Questions for VNX 83

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Frequently Asked Questions for VNX
Which VNX arrays does EMC Storage Analytics support?
It supports first- and second-generation VNX platforms. Support for CX4 covers CX4-120,
CX4-240, CX4-480, and CX4-960 platforms. Supported NS series includes NS120, NS240,
and NS960 platforms. A complete list of the supported models in each of these series is
available in
Installation requirements on page 16
.
Will EMC Storage Analytics continue to collect VNX statistics if the primary SP or CS goes
down?
Storage Analytics will continue to collect statistics through the secondary Storage
Processor if the primary Storage Processor goes down. EMC Storage Analytics will
automatically collect metrics from the secondary Control Station in the event of a Control
Station failover. Note that the credentials on the secondary Control Station must match
the credentials on the primary Control Station
Does the Unisphere Analyzer for VNX need to be running to collect metrics?
No. VNX Block metrics are gathered through naviseccli commands and VNX File metrics
are gathered through CLI commands. However, statistics logging must be enabled on
each storage processor (SP) on VNX Block, and statistics logging will have a performance
impact on the array. No additional services are required for VNX File.
How does the FAST Cache heatmap work?
The FAST Cache heatmaps are based on the FAST Cache read and write hit ratios. This
heatmap will turn red if these ratios are low because that indicates that FAST Cache is not
being utilized efficiently. These heatmaps will turn green when FAST Cache is servicing a
high percentage of I/O.
I purchased a license for the model of the VNX array that I plan to monitor. When I
configure the adapter instance for VNX File, why does an "invalid license" error message
appear?
Control Station may not be reporting the correct model or the array. Log into Control
Station and check the array model with the command:
/nas/sbin/model
. Verify that
the array model returned matches the model on the Right to Use certificate.
After a Control Station failover, why is the VNX File adapter instance marked down and
why does metric collection stop?
The failover may have been successful, but the new Control Station may not be reporting
the correct model of the array. This results in a failure to validate the license and all data
collection stops. Log into Control Station and check the array model with the
command:
/nas/sbin/model
. If the model returned does not match the actual model
of the array, Primus case emc261291 in the EMC Knowledgebase provides possible
solutions.
The disk utilization metric is not visible for my VNX Block array. Why not?
The disk utilization metric is not supported on VNX arrays running a VNX Block OE earlier
than Release 32. Upgrade to VNX Block OE Release 32 or later to see this metric in
vCenter Operations Manager.
I am unable to successfully configure an EMC Adapter instance for VNX File when using a
user with read-only privileges. Why does this happen?
A user with administrative privileges is required while configuring an EMC Adapter
instance for VNX File arrays running an OE earlier than 7.1.56.2. Upgrade to VNX File OE
7.1.56.2 or later to be able to configure an adapter instance using a user with read-only
privileges.
Troubleshooting
Frequently Asked Questions for VNX
83