Highlighted
ECN-APJ
2 Iron

6 common technical questions about supporting CLARiiON/VNX

6 common technical questions about supporting CLARiiON/VNX

Share: twitter.png

Please click here for all contents shared by us.


Introduction

This article will continue to list another 6 common technical questions about supporting CLARiiON/VNX. Meanwhile, you can read the article of  top 10 common CLARiiON/VNX technical FAQ to know more about CLARiiON/VNX FAQ.

Detailed Information

Question 1:

Does the amber light on CLARiiON/VNX stand for hardware fault?

Answer:

In general, we can determine hardware fault via the amber light on CLARiiON/VNX. However, it doesn’t work for CLARiiON CX4-120/CX4-240/CX4-480 array. If you are using an old CLARiiON CX4-120/CX4-240/CX4-480 array, you may see the LED light show during the POST stage of the storage processor as follows:

untitled.png


Question 2:

Some configuration wizards are not available in Unisphere/Navisphere.

Answer:

Currently, Unisphere 1.0 (Unisphere running on Celerra with DART 6.0) and Unisphere 1.1 (Unisphere running on VNX series with VNX OE for file 7.0) require JAVA Runtime Environment (JRE) 1.6 and does not fully support 1.7. If you have JRE 1.6 and 1.7 installed on the client used for Unisphere access, you may encounter some configuration wizard issues and may not open in Unisphere/Navisphere (example below):

untitled_2.png

You have to explicitly use JRE 1.6 and disable 1.7 as follows:

1. Go to the Windows Control Panel.

2. Double-click the JAVA icon. This will bring up the JAVA Control Panel.

3. In the JAVA Control Panel, go to the “Advanced” tab and click the “JAVA Plug-in” button.

4. Disable the checkmark in the “Enabled the next-generation JAVA Plug-in” column for JRE 1.7.

If you still cannot access the configuration wizard in Unisphere/Navisphere, please uninstall JRE 1.7 and install JRE 1.6, and then try again.

untitled_3.png


Question 3:

How to properly remove a Disk Array Enclosure (DAE)

Answer:

Some customers may encounter this kind of issue. A Disk Array Enclosure had been removed from the array, but you still can see the DAE in the GUI. Meanwhile, the warning light is still on and you several alerts similar to the ones below.

untitled_4.png

It is caused by improperly removing a disk array enclosure. Please follow the following procedure to remove a DAE from a CLARiiON/VNX array:

1. Ensure that the DAE to be removed is the last enclosure of the backend bus;

2. Migrate out and destroy all the LUNs residing in that DAE including the hot spare;

3. Unbind all the RAID groups in that DAE;

4. Detach and remove the two backend bus cables that are connected to that DAE that you want to remove;

5. If multipathing software is installed for the hosts that connect to the CLARiiON/VNX array, you can reboot SPA and SPB one at a time;

6. If no multipathing software is installed, you must schedule downtime to reboot the entire array;

7. The DAE will be removed from the CLARiiON array configuration after the reboot.


Question 4:

What is the difference when you add disk to RAID group/pool for CLARiiON and VNX?

Answer:

CLARiiON and VNX are different when you add disk in an existing RAID group or pool, please refer to the following table:

Product

CLARiiON

VNX

Can we add disk in an existing RAID group

Yes

No

Can we add disk in a existing pool

Yes

Yes

comment

1. RAID 6, RAID 1, RAID 3, single disk and   the RAID group of Hot spares does not support to add disk;
  2. The maximum disk in a RAID group is 16.

From release R32, the tier of pool supports   to configure different RAID group.


Question 5:

Why does the HP-Unix host always show “Not Logged In” in the Unisphere/Navisphere?

Answer:

If the host is HP-Unix, then you will see the HBA logged in to FA only when there is an I/O from host to CLARiiON. To check the physical connection between storage and host as follows:

1. Execute the following command on HP-Unix host (c#t#d# is a device of storage):

# dd if=/dev/rdsk/c#t#d# of=/dev/null bs=512

count=10000000

10000000+0 records in

10000000+0 records out

2.  Refresh the state of initiators, and then you will see that the status of HBA card is “Logged In”.


Question 6:

How to correctly configure the parameter when collecting the NAR file?

Answer:

When you open Windows to collect the NAR file, there are some parameters you should know:

A. Real Time Interval:

Is the interval in seconds between polls on the storage system (range is 60 to 3600; default is 300 seconds). Set the Real Time Interval equal to the Archive Interval to minimize polling overhead if you are not looking at data in real time.

B. Archive Interval:

Controls the interval at which the system is polled and data is collected for the archive file (range is 60 to 3600; default is 300 seconds). Setting the value lower than the default value may have significant performance impact.

C. Periodic Archiving:

Specifies that the logger periodically creates archives from the collected log data. Logging is disabled by default.

D. Stop Automatically After:

Specifies that logging will stop automatically after a specified number of days that you specify in the Days list box (1-30 days). The checkbox is unchecked by default; you can change it when the logger is stopped.

 

  untitled_5.png

                                                                                                                  

             


Tags (2)