In this article, we will talk about several common VNX faults and their solutions.

Question 1: Unable to access Unisphere after upgrading to Java version 7 or 8

Solution:

Under Java Release Version 7 Update 51 the Security, by default, is set to High. As a result Java applications identified by a certificate from a trusted authority will be allowed to run, whereas all will be blocked.

There are two options to resolve this issue. Before proceeding with the 2 workarounds please verify that the current version of Java is the only version running. If there are older versions please remove them before proceeding.

Option 1: Set Java Security to "Medium"

1. Open the Control Panel

2. Select "Programs"

3. Select "Java (32-bit)"

4. Select "Security" tab

5. Set "Security Level" to "Medium"

6. Select "Apply" and then "Okay"

Option 2: Add Unisphere to filter (This will need to be done for each Unisphere Device [i.e. SP Address + CS Address])

1. Open the Control Panel

2. Select "Programs"

3. Select "Java (32-bit)

4. Select "Security" tab

5. Select "Edit Site List..."

6. Add URL of Unisphere

7. Select Okay

8. Select "Apply" and then "Okay"

    

Question 2: Unable to use vSphere VSI Unified Storage Manager to manage VNX block storage

Solution:

After installing VSI Unified Storage Management and configuring VNX block access, the customer receives a status "Could not find valid software header for entry line.  Unable to validate the identity of the server. There are issues with the certificate presented"

The reason is when running commands directly in a command prompt,NaviCLI has the ability to prompt for a security certificate. VSI does not have the ability to prompt for a certificate causing it to fail this step.

To solve this, NaviCLI needs to be re-installed with specific options selected.

1. Go to Start > All Programs > EMC > NavisphereCLI > Uninstall Navisphere CLI

2. Select "Repair / Reinstall"

3. Under "Set Verification Level", select Low

4. Under "Create Security File", select Do not create security credentials file

5. Select Next then Install

    

Question 3: Why sometimes “Copy to Hot Spare” request would fail?

Solution:

The general rule for a proactive spare is that a copy to hot sparing can only take place on a redundant RAID group. There can be only one active copy-to-hot spare operation per RAID group. Multiple copy-to-hot spare operations can be taking place as long as they are on different RAID groups. At least one hot spare must be left to be used for hot sparing only.   The exception is if only one hot spare is bound in the storage system. Then it can be used as a proactive hot spare. 

Question 4: An error message shows up when configuring dial-home template on VNX

Solution:

The error message is "Logging event to system log by agent on SP is not supported." Then the user is unable to assign template.

To solve this, right-click the template. Uncheck the "Log to System log" option.

Question 5: Which methods can change the IP address of VNX SP

Solution:

Refer to the following table

                

Device   Type	Login   Type	Parameters	Notes
VNX   Unified	Setup   Page	IP   address, subnet mask, gateway	Grayed   out
VNX   Unified	Proxy   ARP	IP   address, subnet mask, gateway	No   reboot
VNX   Block | CLARiiON	Setup   Page	IP   address, subnet mask, gateway, Network name	SP   reboot
VNX   Block | CLARiiON	NaviCLI	IP   address, subnet mask, gateway	No   reboot
VNX   block | CLARiiON	NaviCLI	Network   name	SP   reboot

Question 6: When using Unisphere Central to provision storage, the wizard will divide the storage size which is greater than 20G into two parts

Solution:

This will happen when using Metrics Configuration:

    

         

From Unisphere online help document, we can know that this is expected behavior and working as designed. Unisphere Central allocates approximately 10 GB of storage immediately and the remainder of the storage in a background process.

    

Question 7: After storage pool expansion, the operation is always in “Rebalancing” status

Solution:

This is expected behavior and working as designed.

The ”Operation” lists the type of operation in progress or the last operation completed, and the percent complete of that operation. If the pool was expanded and a rebalance operation is being performed, this value displays as Rebalancing. If another pool operation starts during the rebalance operation, the other pool operation is shown instead.

Translator: Roger