Celebrate National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17


vmware esxi 5.1 iscsi readynas 2100 doesn't connect

Posted on 2013-05-17
Medium Priority
Last Modified: 2013-06-17
I have 2 esxi 4.1 hosts already connected to my Netgear ReadyNAS 2100 with iscsi, and I'm trying to add the 3rd host, running esxi 5.1.

The static discovery on the iscsi storage adapters shows me all of the targets, but does not add the paths.

I've added the iscsi name on the ACL on the readyNAS - no go.

Just upgraded the NAS to 4.2.22, still no go.
Question by:snowdog_2112
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 6
  • 6
LVL 123
ID: 39175548
is this problem with ESXi 5.1 only?

is the NAS certified for use with ESXi 5.1?

do the LUNs appear on the ESXi 5.1 host?

Author Comment

ID: 39175901
Problem only with esxi 5.1 host: YES

NAS on Storage HCL:  YES (with firmware 4.2.21, 4.2.22 installed)

LUN's appear on 5.1 host: NO  (see attached - I see the targets, but in Storage Adapters, no LUN's, no Paths)
LVL 123
ID: 39175920
this hosts IQN has been added to the LUNs on NAS?
Get your Conversational Ransomware Defense e‑book

This e-book gives you an insight into the ransomware threat and reviews the fundamentals of top-notch ransomware preparedness and recovery. To help you protect yourself and your organization. The initial infection may be inevitable, so the best protection is to be fully prepared.


Author Comment

ID: 39181260
Yes - I've triple-checked this.  One LUN on the ReadyNAS, in fact, does not have ACL's enabled (which seems like a bad plan, but I inherited this config).
LVL 123
ID: 39199697
can you upload screenshots of the ReadyNAS configuration of LUNs?

Author Comment

ID: 39202060
Is there something you're looking for in the LUN config on the NAS?

I am copy/pasting the IQN from the hosts to the NAS interface, and as mentioned, one Target/LUN does not even have ACL's enabled.

There is one LUN per target defined on the NAS.
LVL 123
ID: 39202144
if you remove one LUN config from the NAS, does the ESXi host server connect to it correctly, the new one?

Author Comment

ID: 39202610
Can't remove a LUN - they are active production LUN's on the 2 other hosts.

I could add a new target and LUN...
LVL 123
ID: 39202908
I would escalate to Netgear Support, some configuration must be incorrect, for the LUN not to be seen.

What size is the LUN?

have you tried adding LUNs to existing targets?

Accepted Solution

snowdog_2112 earned 0 total points
ID: 39242203
Contacted VMware - we reset the MTU on all devices - vSwitch, port group, and NIC.  Started working.

I must not have hit the magic combination in my testing various settings - though I am pretty sure I did, because MTU was one item I specifically looked at.
LVL 123
ID: 39242223
very strange....seems like a bug that frames would cause an issue not to connect!

what was the frame (MTU) set to? normally you would use Jumbo Frames >=9000.

Author Closing Comment

ID: 39252592
None of the suggested solutions mentions MTU.

Featured Post

What Is Blockchain Technology?

Blockchain is a technology that underpins the success of Bitcoin and other digital currencies, but it has uses far beyond finance. Learn how blockchain works and why it is proving disruptive to other areas of IT.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Each year, investment in cloud platforms grows more than 20% (https://www.immun.io/hubfs/Immunio_2016/Content/Marketing/Cloud-Security-Report-2016.pdf?submissionGuid=a8d80a00-6fee-4b85-81db-a4e28f681762) as an increasing number of companies begin to…
Many businesses neglect disaster recovery and treat it as an after-thought. I can tell you first hand that data will be lost, hard drives die, servers will be hacked, and careless (or malicious) employees can ruin your data.
Teach the user how to use create log bundles for vCenter Server or ESXi hosts Open vSphere Web Client: Generate vCenter Server and ESXi host log bundle:  Open vCenter Server Appliance Web Management interface and generate log bundle: Open vCenter Se…
This video teaches viewers how to encrypt an external drive that requires a password to read and edit the drive. All tasks are done in Disk Utility. Plug in the external drive you wish to encrypt: Make sure all previous data on the drive has been …

730 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question